Their lifestyle of migrating between the vast plains and the bizarre and awesome shelter of the Thunder Hills has had a major impact on the society, cultures and personalities of the Plainsfolk.

The Plains folk where Highlanders driven by population pressure and political persecution to cross the Firehose and start a new life on the Plains.

The Plains diaspora was made possible by the exploration and navigation skills of the legendary Fenman

This is the classic Wetlings (young Fenling) joke.

When the Generation Ship arrived, after passing and rejecting many other stars and planets, the social tensions exploded so rapidly in a classic "Revolution of Rising Expectations" that all the settlers were all planetside long before anybody gave thought to naming the thing.

All landing parties, except the Fenlings, eventually gave due thought and pompous names, to the Planet.

The Fenlings were the least powerful grouping on the whole ship and ended up with a halfworking shuttle that crashlanded them in the least desirable part of the whole Planet. From space it was obvious how unpleasant and dangerous the Fens would be.

For the first Fenlings its was so unpleasant and dangerous that they didn't even have time to name, in any vaguely polite fashion, the Planet on which they now resided. (Indeed all Earth tech available to them was swept away in the first Floodtime.)

But once the Fenlings had worked out how to live in the Fens, (and various interesting bits of the Fens had learnt how to live in them...), things changed.

True, its was still very dangerous. It could also on occasion be downright nasty. But the abundance of the Fens gave rise to such sayings as "Fat as a Fenman." "Fertile as a Fenwife." Thus it was that in a mere 2 centuries, the population pressure in the Fens drove the Fenlanders forth to discover and dominate all other landing parties.

Which is why the Planet is simply known as "The Planet".

Experience has shown that the main body of the Firehose may suddenly divert down a primary split if for some reason, such as a channel clearing, the water level in that split drops below that of the other splits.