William De Grandison, b: 1255 - Cassington, England



		^{Edmund De Mortimer}^{b.1306 Wigmore, England d.1331 Stanton, Shropshire, England}

	^{Roger De Mortimer}^{b.1328 Ludlow, Shropshire, England d.1359 Rouvray, France}		^{Bartholomew De Badlesmere}^{b.1275 Castle, England d.1322 Canterbury, Kent, England}

^{Margery De Mortimer}^{b.1352 Wigmore, England d.}			^{William De Montague}^{b.1275 Cassington, England d.1319}

		^{William De Montacute}^{b.1302 Cassington, England d.1343 Windsor Castle, England}	^{Elizabeth De Montfort}^{b.1275 Beaudesert, England d.1345}

	^{Philippe De Montagu}^{b.1328 Salisbury, Wiltshire, England d.1381 Bisham, Berkshire, England}		^{William De Grandison}^{b.1255 Cassington, England d.1335}

		^{Katherine De Grandison}^{b.1304 Ashford, England d.1349 Bisham, Berkshire, England}	^{Sybil De Tregoz}^{b.1271 Ewyas Harold, England d.1334}