Mortimer Mortimer: Origin and meaning of surname Mortimer: Earliest records of surname Mortimer: Family tree Mortimer: Individuals Edward Mortimer (1635-1704) John Mortimer (1669- 1715) Joseph Mortimer (1710-1776) Edward Horlock Mortimer I (1752-1803) Edward Horlock Mortimer II (1786-1857) John Baskerville Mortimer (1819-1847) Rosina Kate Mortimer (1844-1936), see Lawrence Heyworth