John married Helen verch Llewelyn (3660) , daughter of Llywelyn Fawr ap Iorwerth Prince of Wales (1173-11 Apr 1240) & Joan Plantagenet (3241) (ca 1186-4 Mar 1237). Born ca 1206 in Gwynedd, Wales. Helen died bef 24 Oct 1253.
2927. Isabella of Huntingdon. Born ca 1199. Isabella died ca 1251/2.
Isabella married Robert V de Bruce. Born ca 1195. Robert V died in 1245.