Eve was born on an unknown date, the only daughter and suo jure heiress of Robert de Bermingham, a Norman, who arrived in Ireland with the Cambro-Norman forces of Richard de Clare, 2nd Earl of Pembroke, known to history as "Strongbow".
De Bermingham was enfeoffed by Strongbow with part of the kingdom of Ui Failghe, which became the barony of Offaly.
Sometime about 1183, she married her first husband, Gerald FitzMaurice, the second-eldest son of Maurice FitzGerald, Lord of Llanstephan.
When he died in 1211, she took a third husband, Geoffrey de Marisco (du Marais), who held the office of Justiciar of Ireland from 1215 to 1221.
[2] The female succession in the de Bermingham fee, as well as Eve's multiple marriages, slowed down the Anglo-Norman advance in the former kingdom of Ui Failghe.