Her brother was Robert, 4th Earl of Leicester; when he died, under the French rules of inheritance, his lands were divided between his two sisters.
Amice was the elder and received the city and title of Leicester whilst Margaret inherited Winchester.
[2] Amice had married Simon de Montfort at some time and that marriage ended when she became a widow in 1188/1189.
Amice and her descendants never exploited their ownership of Leicester because of hostilities between England and France.
However the family continued their claim and it was proven by the 6th Earl, Simon de Montfort.