Roger de Mowbray Baron Mowbray of Thirsk
Roger de Mowbray was born in 1218 in Axholme, Lincolnshire.  He died at the age of 48 in November 1266.

 Maud de Beauchamp
Maud was born in 1240 in Bedford, England.  She died at the age of 33 in April 1273.

 Roger de Mowbray II Lord Thirsk
Roger de Mowbray II was born in 1254 in Axholme, Lincolnshire or Thirsk, Hovington, Yorkshire.  He died at the age of 43 on November 21st, 1297 in Ghent, Netherlands.