Cecilia de Thweng (1215-1265)
Cecilia de Thweng(e)(1215-1265) is mentioned in several
genealogies as the wife of William Constable (?1205->1260).
Only cited source is AN OFFICIAL, GENEALOGICAL, AND
HERALDIC BARONAGE OF ENGLAND [Paget].She was apparently
the d/o Marmaduke de Thweng (1164-1235).
Is there any other supporting evidence?