General Obi Wan Kenobi
A General during the Clone Wars, a Jedi Knight, teacher to both Anakin Skywalker and his son Luke... Obi-Wan Kenobi has held many positions in his life, and more than a few lightsabers as well. His first lightsaber, carried for his time as a padawan, was an old style lightsaber, reminiscent of his own Master's. The lightsabers was lost during a battle with the Sith Lord Darth Maul. It is unknown when he replaced that lightsaber with the weapon carried to the Death Star. It is assumed that Obi-Wan used his Master's lightsaber for a time after using it to finally defeat Darth Maul.
Obi-Wan's more current lightsaber is the inspiration for Luke's newer lightsaber...