I am researching my husband's ancestry. He seems to be a descendant of French Royalty. I have been adding several ancestors to my tree and have noticed a discrepency. I have listed a Francois De La Tour Landry as being married to Diane de Rohan Gie and they had a son named Claude Landry. Claude married a Jeanne Dugast. Jeanne's father was Nicholas Dugast and in every public tree that I have come across, it listed Nicholas wife and Jeanne's mother as Diane de Rohan Gie. That would mean Claude's mother was also his mother-in-law. Does anyone have the correct information on these two families. Claude was born abt. 1570 and Jeanne was born abt. 1573. They were both born in France. Any info would be appreciated.