Question: Who is Thomas Butler, 1St Baron Dunboyne's paternal grandmother?
Sentence (from "Theobald Butler, 4th Chief Butler of Ireland"): Theobald Butler, 4th Chief Butler of Ireland (1242 – 26 September 1285) was the son of Theobald Butler, 3rd Chief Butler of Ireland and Margery de Burgh, daughter of Richard Mor de Burgh, 1st Lord of Connacht.
Relevant evidence: Yes