The runaway / noble family story
One of the most intricate myths I've ever encountered is the story of Thomas Pasmere Carpenter. This one seems to be not so much an old family story as a intentionally created myth. This fabrication was the subject of a masters degree thesis by Susan Reynolds. You can read it here. Thomas was also a runaway. He abandoned a wealthy shipping family from Devon to live in a cave among the Powhatan Indians and of course marries his Indian Princess.
Other myths in my trees include the three brothers myths. You know the one, three brothers left xyz and sailed to America. Then there is the ancestor who escaped a British Man-O-War in a barrel, I rather like that one. One of my favorites is the son of an Earl who became a miller and immigrated to Boston in 1630 with the Winthrop Fleet.
I never understand people who don't research their ancestors and try to get the real story. I guess I am a 'Doubting Thomas' by nature and I like my ancestors plain and simple. It's the finding that I enjoy; tracking them down and proving the exist. But hey, if I end up being related to a bit of royalty, I'm down with that.
Do you have any good ancestor myths? Post them in the comments and we can compare stories.