With Emmeline he had a daughter, Lady Maud de Lacy, who married Walter de Burgh, Lord of Connaught in 1264. He became Earl of Ulster in her right.
He had a child with Emmeline, Lady Maud de Lacy, who eventually married Walter de Burgh, the Lord of Connaught in 1264. This led to his ascension as the Earl of Ulster through his daughter's marriage.