She is also called Isabel dau. William de Ergham in: Early Yorkshire Charters: Volume 11, The Percy Fee, William Farrer, Charles Travis Clay, 106, 109-112, 149, 152. > Doug Smith

Also Calendar of the Close Rolls Preserved in the Public Record Office ..., Volume 1, p 91. Feb 7, 1327. Westminster. "Philip son of Philip de Neville, knight, William son of William de Erghum, and Thomas his brother acknowledge that they owe to to Philip de Nevill of Scotton, the elder, knight, 1000l.: to be levied, in default of payment, of their lands and chattels in co. Derby." Doug Smith