PS It's really important that we use the most well-researched sources that we can for our medieval families on Geni. For those of you not familiar with it, the Foundation for Medieval Genealogy website and its Medieval Lands Database reflect the best and most comprehensive scholarship that we can find online, using primary sources as often as possible and reflecting outstanding critical questioning and scholarship.
So when there is any question, I would always trust FMG over a private, individual genealogy site.
There have only been a few occasions when I've found MedLands lacking--but that's generally because Charles Cawley (its compiler) tends to err on the side of caution, and does not include relations that are only speculative and don't have some grounding in the primary data or scholarship. The only time I would challenge MedLands is if some very recent medieval scholars (e.g. Keats Rohan) have published a new interpretation about a genealogical issue. And usually, Cawley is on top of those, too, and keeps the MedLands database well updated.
So always go there first. http://fmg.ac/Projects/MedLands. You won't be sorry! (You may also learn a little Latin along the way ;-)
Pam