Whakaotihia te rerenga e whai ake nei: Ko ia te tama taitamariki a Hugh de Balliol me Cecily de Fontaines. I mahi a Eustace hei Sheriff o Cumberland me te Kawana o Carlisle Castle mai i te Oketopa 1261 tae noa ki te 1265. I marenatia a Eustace ki a Helewise, te tamahine a Ranulph de Lexington me Ada de Gernon. I tangohia e ia te ripeka i te tau 1271 ka haere ia ki te pakanga ki te Whenua Tapu, hei wāhanga o
Ko te pakanga a Te Ariki Edward. I hoki mai ia, ka rongo kua mate tana wahine a Helewise. I marena tuarua a Eustace ki a Agnes, te tamahine a William de Percy me Joan Briwere. I mate ia i te tau 1274 kaore he uri i ora.