Roger II de Mowbray
Roger II was born in Of Thirsk and Slingsby.  He died in 1266.

 Maud de Beauchamp
Maud was born in 1220.  She died before April 1273.

 Roger III de Mowbray
Roger III was born about 1257.  He died in 1296.  He was buried in buried at Fountains Abbey.