Mendo de Rausona (Trastamára), Conde de Trastámara - Date of Birth

Either the dates are wrong or the connections are wrong. This Mendo is showing born 950 and his son Froyla is shown born 925.

These links for the connections don't show any dates for Mendo or Froyla but show that Mendo's father died abt. 725

https://our-royal-titled-noble-and-commoner-ancestors.com/p1083.htm...

https://gw.geneanet.org/foullon?lang=en&pz=matheline+marie+herm...

https://fabpedigree.com/s024/f518074.htm

So there is a big leap or gap, whatever, between when Mendo's father died abt. 725 and then the son and grandson being born in the 900s.