Could someone check the research for me please. Current theory is that Eustace de Blois and an unknown Mistress was the parents of Eustachie. FL Weis also lists the following:
Line 169A
25. STEPHEN OF BLOIS, King of England (169-25), b. 1095/6, d. 25 Oct. 1154; m. abt. 1119, MATIIDA OF BOULOGNE (158-24).
26. EUSTACE IV, Count of Boulogne, 1150, son and h. app., b. abt. 1120, d.v.p. 10 Aug. 1153; m. abt. Feb. 1140, Constance, d. abt. 1180 s.p., dau. of LOUIS VI (101-24), King of France. Eustace had by unknown mistress,
27. EUSTACHIE, of Champagne, d. bef. 1164; m. (1) Geoffrey de Mandeville, d.s.p., Earl of Essex, (div.); m. (2) Anselme Candavaine, Count of Saint-Pol, son of Hugh III Candavaine. (ES III.4/622).
Thank you,
Mary