Roger de Lascelles
Roger de was born before 1232 in Kirby Knowle, Thirsk, North Ride Yorkshire, England.  He died in 1297.

 Isabella FitzThomas
Isabella was born about 1245 in Greystoke, Cumberland, England.

 Avice de Lascelles
Avice de was born about 1268 in Kirby Knowle, Thirsk, North Ride Yorkshire, England.

 Maud de Lascelles
Maud de was born about 1278 in Kirby Knowle, Thirsk, North Ride Yorkshire, England.