[12307] See "Medieval English Ancestors of Certain Americans," Carl Boyer III (Santa Clarita, CA, 2001), p. 245. "http://www.geneajourney.com/tregoz.html states that Robert I is son of William de Tregoz (b. c.1150, "of Billingford, Norfolk") and Agnes _____, and that Robert I was of Billingford, Norfolk, and Ewyas Harold, Herefordshire. http://www.aritek.com/hartgen/htm/de-tregoz.htm states that William de Tregoz is son of Lesire de Tregoz (b. before 1074 in Billingford, Norfolk, England). Cf. http://helenesgenes.com/Tregoz.html.