Sometimes you hit an ancestral line that keeps going and going because it is a royal line. The dates seem to be unreasonable but because the lines have been proven many times over you know they are real.
I’ve been one of the fortunate genealogy researchers whose ancestral trees intersect with royalty as often as not. When trying to put a little of their lives in context with the names of dates, it is difficult to find documents that originated in the correct time period rather than in a fairy tale story that is set in the same time frame.
My English / French lines are often found in the Domesday Book. It isn’t light reading but is enjoyable, especially if you find translations that relate to smaller sections of England rather than the massive overall collected tome.
Let’s look at the book, “A Literal Extension and Translation of the portion of Domesday Book relating to Cheshire and Lancashire, and to parts of Flintshire and Denbighshire, Cumberland, Westmoreland and Yorkshire”