General Notes

John de Sudeley; living 1130; married Grace, daughter of William de Tracy (died c1136), illegitimate son of Henry I, late in whose reign he died. [Burke's Peerage]

Note: Ancestral Roots, in line 222, which used to have Grace as daughter of William, now states that she is of "parentage unknown" because William de Tracy had no daughter named Grace.  I have her of Henry based on World Connect sources.
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John, the elder son, assumed his surname from Sudeley, the chief seat which he inherited, becoming John de Sudeley. He m. Grace, dau. and heir of Henry de Traci, feudal Lord of Barnstaple, and had issue, Ralph and William. He was s. by his elder son. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage, Ltd., London, 1883, p. 520, Sudeley, Barons Sudeley]