This is a chart made with Family Tree Maker. It starts with my earliest known THATCHER, my direct line is in purple. I have included eleven generations here with known # of children.  For more info, email me.  Some information has been omitted on living individuals.

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1 PETER THATCHER Number of children: 1
...+?? Number of children: 1
...........2 (Rev) PETER THATCHER b: Abt 1587 in Queens Camel, Somerset, Eng. d: Feb 16, 1639/40 in St. Edmonds, Salisbury, Wilts, Eng. # of chlrn: 10
.................+ANNE ALLWOOD b: 1589 in Salisbury, Wilts, Eng. m: Abt 1613 d: Aft 1627 # of chlrn: 7
.........................3 JOHN THATCHER b: 1615 in Eng.
.........................3 PETER THATCHER b: 1616 in Eng.
.........................3 THOMAS THATCHER b: May 1, 1620 in Milton Clevedon, Somerset, Eng. d: Oct 15, 1678 in Boston, Suffolk, MA, bd: Kings Chapel, Boston, MA # of chlrn: 5
..............................+ELIZABETH PARTRIDGE b: Abt 1620 in Duxbury, Plymouth Co., MA m: May 11, 1643 in Duxbury, Plymouth Co., MA d: Jun 2, 1664 in Weymouth, Suffolk, MA # of chlrn: 6 Father: (Rev.) RALPH PARTRIDGE Mother: PATIENCE _??_
......................................4 THOMAS THATCHER b: 1644 in Duxbury, Plymouth Co., MA d: Aug 2, 1686 in Boston, Suffolk , MA # of chlrn: 5
............................................+MARY SAVAGE b: Jun 6, 1647 m: 1670 # of chlrn: 5 Father: Mother:
....................................................5 ELIZABETH "ELIZA" THATCHER b: Dec 26, 1671 in Boston, Suffolk, MA
....................................................5 THOMAS THATCHER b: Sep 25, 1673 in Boston, Suffolk, MA
.........................................................+MARGARET HAYWOOD b: 1681 Father: Mother:
....................................................*2nd Wife of THOMAS THATCHER:
.........................................................+Katherine Tuck EVERTON b: Nov 12, 1677
....................................................5 JOHN THATCHER b: January 22, 1674/75 in Boston, Suffolk, MA
..........................................................+MARY MOULD b: Abt 1675 Father: Mother:
....................................................5 PETER THATCHER b: Aug 26, 1677 in Boston, Suffolk, MA
......................................................... +HANNAH CURWIN b: Feb 14, 1670/71
....................................................5 MARY THATCHER b: January 28, 1679/80 # of chirn: 2
.........................................................+GEORGE KILCUP b: Abt 1680 m: Abt 1712 # of chlrn: 2
............................................................. ....6 GEORGE KILCUP b: Aug 3, 1713
............................................................. ....6 SAMUEL KILCUP b: Jun 16, 1716
......................................4 RODULPHUS "RALPH" THATCHER b: Jan 1, 1648/49 in Duxbury, Plymouth Co., MA d: Jul 26, 1733 in Groton, New London, CT, bd: Rose Hill Cem., Groton, MA # of chlrn: 9
............................................+RUTH PARTRIDGE b: 1647 in Duxbury, Plymouth Co., MA m: Abt Jan 1, 1668/69 in Duxbury, Plymouth Co., MA d: Oct 30, 1717 in Groton, New London, CT # of chlrn: 9 Father: GEORGE PARTRIDGE Mother: SARAH TRACY
....................................................5 THOMAS THATCHER b: Oct 9, 1670 in Duxbury, Plymouth, MA
.........................................................+MARY DEANE b: Abt 1670
....................................................5 ELIZABETH THATCHER b: Mar 1, 1671/72 in Duxbury, Plymouth, MA # of chlrn: 7
.........................................................+SAMUEL FULLER b: 1670 # of chlrn: 7 Father: SAMUEL FULLER (Sr.) Mother: MARY IDE
................................................................. 6 REBECCA FULLER b: Jul 22, 1701 in Mansfield Twp, Tolland, CT
................................................................. ......+JOSEPH ALLEN b: Abt 1701
................................................................. 6 RODOLPHUS FULLER b: Aug 22, 1703 in Mansfield, Tolland, CT
.................................................................. .....+ANNE HALL b: Jun 1, 1706 in Mansfield, Tolland, CT
.................................................................. .....*2nd Wife of RODOLPHUS FULLER:
.................................................................. .....+ANN ROBINSON b: Aug 5, 1708 in Tisbury, Dukes, MA
................................................................. 6 RUTH FULLER b: Apr 12, 1706 in Preston, New London, CT
................................................................. ......+PETER ROBINSON b: Dec 7, 1697 in Preston, New London, CT
................................................................. 6 ELKANAH FULLER b: Apr 24, 1709 in Mansfield, Tolland, CT
................................................................. ......+MARY ANDREWS b: Dec 7, 1710 in CT
................................................................. *2nd Wife of ELKANAH FULLER:
................................................................. ......+LYDIA HOOKER b: Abt 1709
................................................................. *3rd Wife of ELKANAH FULLER:
................................................................. ......+NAOMI _??_ b: Abt 1709
................................................................. 6 WAITSTILL FULLER b: Apr 8, 1711 in Mansfield, Tolland, CT
................................................................. ......+THOMAS HEATH b: Jul 25, 1712 in Haverhill, Essex, MA
................................................................. 6 MARY FULLER b: Apr 5, 1713 in Mansfield, Tolland, CT
.................................................................. .....+JOSEPH TRACEY b: Aug 25, 1715 in Mansfield, Tolland, CT
.................................................................6 JUDAH FULLER b: Aug 25, 1715 in Mansfield, Tolland, CT
................................................................. ......+ABIGAIL WENTWORTH b: Abt 1715
....................................................5 ANN THATCHER b: Nov 26, 1673
....................................................5 RUTH THATCHER b: Nov 1, 1675
....................................................5 RALPH THATCHER b: Abt Jan 9, 1676/77 in Duxbury, Plymouth Co., MA d: Aug 6, 1757 in Lebanon, New London, CT # of chlrn: 7
.........................................................+PATIENCE SKIFFE b: 1682 in Martha's Vineyard, MA # of chlrn: 7 Father: NATHAN SKIFFE Mother: HEPSIBAH CODMAN
................................................................. 6 THOMAS THATCHER b: Bef Jul 21, 1721 in Lebanon, New London, CT d: Dec 27, 1763 in Lebanon, New London, CT # of chlrn: 10
................................................................. ......+HANNAH _??_ # of chlrn: 10 :
................................................................. ..............7 SARAH THATCHER b: Oct 12, 1740 in Lebanon, New London, CT d: Dec 26, 1766
.................................................................. .............7 THOMAS THATCHER b: Sep 20, 1741 in Lebanon, New London, CT d: unk
................................................................. ..............7 HANNAH THATCHER b: Sep 25, 1743 in Lebanon, New London, CT d: unk
................................................................. ..............7 EBENEZER THATCHER b: Apr 1, 1744 in Lebanon, New London, CT d: unk
................................................................. ..............7 ELIZABETH THATCHER b: Apr 26, 1747 in Lebanon, New London, CT d: unk
................................................................. ..............7 DEBORAH THATCHER b: May 28, 1749 in Lebanon, New London, CT d: unk
................................................................. ..............7 JOSEPH THATCHER b: Jun 23, 1731 in Lebanon, New London, CT d: unk
................................................................. ..............7 MARY THATCHER b: Aug 8, 1738 in Lebanon, New London, CT d: unk
................................................................. ..............7 ELISHA THATCHER b: Aug 31, 1760 in Lebanon, New London, CT d: December 24, 1835 in ??
................................................................. ..............7 ELIAKIM THATCHER b: March 30, 1763 in Lebanon, New London, CT d: Jan 14, 1848 in Arkwright, Chatauqua, NY # of chlrn: 3
................................................................. ...................+DEBORAH SWIFT b: ? m: Dec 8, 1785 d: Unk # of chlrn: 3 Father: CHARLES SWIFT Mother: DEBORAH CLARK
................................................................. ...........................8 CHARLES THATCHER b: Feb 12, 1794 in Ellington, Tolland Co., CT d: Feb 22, 1860 in Marion, Wayne, NY # of chlrn: 12
................................................................. .................................+LYDIA SMITH b: Jun 11, 1797 in Stockington, Bershire Co., MA m: Jan 4, 1814 d: Jun 18, 1851 in Warren, Wayne, NY # of chlrn: 12
................................................................. .........................................9 LYDIA THATCHER b: Jun 14, 1815 d: Abt. 1815
................................................................. .........................................9 ELVIRA THATCHER b: Mar 8, 1817 d: May 13, 1858
................................................................. .........................................9 Emily Maria THATCHER b: Jan 28, 1819 d: Abt. Nov 25, 1906
................................................................. .........................................9 JULIETTE THATCHER b: Jun 7, 1821 d: Feb 22, 1894
................................................................. .........................................9 GEORGE THATCHER b: Jul 1, 1823 d: Abt. 1823
................................................................. .........................................9 ROMANZO Charles THATCHER b: Aug 13, 1824 in Warren, Wayne, NY d: Apr 19, 1887 in Wise Co., TX, bd: Eakins Cem., Ponder, TX # of chlrn: 6
................................................................. ..............................................+LUCY Ann COLBY b: Oct 11, 1831 in Wayne Co., KY m: Aug 18, 1848 d: Feb 20, 1901 in Wise Co., TX, bd: Eakins Cem., Ponder, TX # of chlrn: 6 Father: JOHN COLBY Mother: _??_
................................................................. ......................................................10 ELLEN J. THATCHER b: Abt. 1849 in NY d: Bef. 1860
................................................................. ......................................................10 CHARLES B. THATCHER b: Feb 2, 1852 in NY d: Oct 2, 1893 in Denton Co., TX, bd: Eakins Cem., Ponder, Denton, TX
................................................................. ......................................................10 ADELLA M. THATCHER b: Oct 11, 1853 in NY d: Mar 16, 1894 in Denton Co., TX, bd: Eakins Cem., Ponder, Denton, TX
................................................................. ......................................................10 BRYON THATCHER b: Abt. 1857 in NY d: unknown
................................................................. ......................................................10 FRANK C. THATCHER b: November 11, 1858 in NY d: Jun 14, 1915 in Denton Co. TX, bd: Stony Cem., Stony, Denton, TX
................................................................. ............................................................+LIZZIE N. _??_ b: Apr 1872 in GA