From Cokayne's Complete Peerage (1945), Volume X, Appendix H, page 101, footnote...

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From Cokayne's Complete Peerage (1945), Volume X, Appendix H, page 101, footnote (f): "The Count of Meulan's eldest daughter was b. 1102, then came twin sons in 1104, and later another son and 4 moredaughters (Orderic, vol. iv, pp. 169, 191), all b. after 1107, as their father mentions only one daughter when making the settlement of his great estates in 1107 or 1108 (Cott., Vesp., D x, f. 132; cf. White, Trans. R. Hist. Soc., 4th Ser., vol. xvii, p. 20)...."

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