William de Rosa, b: - Ingmanthorpe,


			^{Robert de Rosa}^{b.1172 Helmsley, York, England d.1226}
		^{William de Rosa}^{b. Helmsley, England d.1264}
			^{Isabel Avenal}^{b. d.}
	^{William de Rosa}^{b. Ingmanthorpe d.1310}
			^{Piers FitzHerbert}^{b. Brecknock, Wales, England d.}
		^{Lucy FitzHerbert}^{b. d.}
			^{Alice FitzRoger}^{b. d.}
^{Lucy de Rosa}^{b. d.}
		^{Ralph FitzHugh}^{b. d.}
	^{Eustache FitzHugh}^{b. d.}