Hugues De Beaumont-Sur-Oise
Hugues was born about 1090.

 Agnès De Croisilles
Agnès was born about 1110.  Agnès is no longer alive.

 Adam Ier De Beaumont-En-Gatinais
Adam Ier was born about 1140.  He died in 1191 in , Saint-Jean-D'acre, , Isr.