Son of Hugues "Barbatus" de Bastembourg and NN NN Husband of NN NN; Helloe de Beaulac and Gilette 'the Dane' de Beaumont Father of Anslec de Burtrand, lord of Bricquebec; Eremburge de Bricquebec; Richard de Bricquebec, Bastembourg et Monfort-sur-Risle and Turstain de Montfort-sur-Risle
FamilySearch.org gives Gillette's parents as Richard TURSTAIN de BASTEMBOURG and Aubérée de BASTEMBOURG. FamilySearch does not give a date of birth for Richard; it does give a date of birth for Auberee as about 800 AD. Found a record on Geneanet https://gw.geneanet.org/rgrandjean5?lang=en&n=de+bastembourg&oc=0&p=thurstan+richard+turstain that gives Richard's and Auberee's birth in 945 AD. Also shows they had 3 children none of which were named Gillette.