Ralph De Bohun
Ralph De was born about 1195 in Warwick, Warwickshire, England.  He died in England.

 Saveric Fitzgeoffrey De Mandeville
Saveric Fitzgeoffrey De was born before April 19th, 1197 in Kildare, Ireland.

 Franco De Bohun
Franco De was born about 1225 in Midhurst, Sussex, England.  He died in 1273.