Tag this record Other Last Name Fitz Alan, D'Arderne, Hastang Born / Died Birth Date: 0-00-00Death Date: 1300-00-00 (Still living in 1300) Parents Mother: Briouze, Maud de ( - 1300/1)Father: Mortimer, Roger de (1225 - 1282) Siblings Male Mortimer, Ralph de ( - 1274) Mortimer, Edmund de (1252 - 1304) Mortimer, Roger de (1256 - 1326) Mortimer, William de ( - 1297) Female Mortimer, Margaret de ( - 1297) Titles Details of Offices Bibliographic Sources View a list of abbreviations. The Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom. 1887–98 (8 vols); 1910–59 (13 vols). 6 vols. Gloucester: Alan Sutton, 1982 Oxford Dictionary of National Biography.