*Sir William de Keith
born 1236 Humbie, Scotland
died before 1293

father:
*Sir John de Keith Marischal of Scotland
born 1212 Scotland
died before 1270

mother:
*Margaret Comyn
born 1217 Scotland

siblings:
unknown

spouse:
*Barbara de Seton
born 1216? Scotland

children:
*daughter de Keith
*Sir Edward de Keith Marischal of Scotland born 1280 Scotland
died 17 October 1346 Battle of Neville's Cross, England

biographical and/or anecdotal:

notes or source:
LDS
ancestry.com
"Biographical Encyclopedia of the Kings & Queens of Great Britain" by Mike Ashley