Tuhia he whakamāramatanga mō tēnei wāhanga - Ko ia te tamahine a Thomas Randolph, Earl o Moray, te iramutu me te hoa whawhai o Robert the Bruce, me te wahine a Moray, a Isabel Stewart, he tamahine a John Stewart o Bonkyll. I rongonui a Agnes mo tana whakangungu toa o Dunbar Castle i East Lothian ki te whakapae Ingarihi i arahina e William Montagu, 1st Earl o Salisbury, i tiimata i te 13 o Hanuere 1338 ka mutu i te 10 o Pipiri o taua tau ano i te Pakanga Tuarua o te Motuhake o Scotland
mai i te 1331 ki te 1341.