I have 5 surety Barons, and thought wow its a lot. Your line It seems like a bit much, I imagine, maybe one or two are faulty, but it is possible. You have to remember their kids married each other. Making multiple Barons possible in anyones line. Plus mathematically speaking going back 30 generations, you would have over a 1000 great grandfathers. And their were what how many Barons, so yes its certainly possible.
Roger and Hugh Bigod were father and son, while thats two Barons,but its one line. Then a Bigod married a Bohun,,making 2 lines and 3 Barons. A Quincy married a Devere, making 2 barons in one line thru marriage. Looking at it like that, its possible.
Im related to every president except 7. Most have royal blood in their lines. We've always been a Monarchy in a way, we just didnt know it until now. If you come from a family that made connections in marriage, dont be surprised if your a cousin to every president too, lol. Marrying well and keeping it in the family, so to speak, was commonplace with our ancestors.