William de Blennerhassett, b: 1290 - Allerdale, Cumberland.


			^{Balwin [Walvere de Blennerhassett}^{b.1220 Allerdale, Cumberland. d.1246 Torpenhow, Cumberland}

		^{Alan de Blennerhassett}^{b.1248 Allerdale, Cumberland. d.1270}

	^{William de Blennerhassett}^{b.1290 Allerdale, Cumberland. d.}



^{Alan De Blennerhassett}^{b.1325 Allerdale, Cumberland. d.1392}