Roger 1st Baron de Mowbray , of Thirsk, Sir
Roger 1st Baron de was born after 1245 in Thirsk & Hovingham, North Ride Yorkshire, England.  He died in 1296 in Ghent, Flanders.

 Roese de Clare
Roese de was born in 1252 in Tunbridge, Kent, England.  She died after 1316.

 John 2nd Baron de Mowbray , of Thirsk, Sir
John 2nd Baron de was born on September 4th, 1286 in Thirsk, North Ride Yorkshire, England.  He died in executed after battle of Boroughbridge, Yorkshire, England.  He was buried in His corpse left dangling at York for 3 years..