Question: What is the date of birth of Edmund Mortimer (Died 1331)'s mother?
Sentence (from "Joan de Geneville, 2nd Baroness Geneville"): Joan de Geneville, 2nd Baroness Geneville, Countess of March, Baroness Mortimer (2 February 1286 – 19 October 1356), also known as Jeanne de Joinville, was the daughter of Sir Piers de Geneville and Joan of Lusignan.
Relevant evidence: Yes