What nationality are both Grosvenor and Hugh d'Avranches, Earl of Chester?
Hugh d'Avranches, Earl of Chester Hugh d'Avranches (  1047  – 27 July 1101), also known as Hugh the Fat (French: "Hugues le Gros" ) or Hugh the Wolf (Latin: "Hugo Lupus" ), was the second Norman earl of Chester (2nd creation) and one of the great magnates of early Norman England.
Castell Aberlleiniog Castell Aberlleiniog ("Castle of the River Lleiniog") is a motte and bailey fortress near the Welsh village of Llangoed on the Isle of Anglesey, built between 1080 and 1099 by Hugh d'Avranches, 1st Earl of Chester. It is about two miles distant from Beaumaris Castle, and was built atop a very steep hill.