Cecily de Beauchamp was born circa 1331 in England to John de Beauchamp, 2nd Baron Beauchamp of Hacche (c1306-1343) and Margaret de St. John (1304-1361) and died 7 June 1394 England of unspecified causes. She married Roger de St. Maur (c1321-1366) .
|Offspring of Roger de St. Maur and Cecily de Beauchamp (c1331-1394)|
|William de St. Maur (c1349-1391)||1349 England||25 August 1391 Brobury, Herefordshire, England||Margaret de Brockbury (c1350-)|
|Ralph Seymour (c1350-c1375)|