Ida de Tosny, Countess of Norfolk (died after 1181), was an English royal mistress. Named after her grandmother Ida de Hainaut she was the daughter of Ralph IV de Tosny (died 1162) and his wife Margaret (born circa 1125 and living in 1185), a daughter of Robert de Beaumont, 2nd Earl of Leicester.[1]
[1] Marc Morris: The Bigod Earls of Norfolk in the Thirteenth Century, Woodbridge, Suffolk, 2005, page 2)
Ida de Tosny was a royal ward and mistress of Henry II, King of England, by whom she was mother of one of his illegitimate sons, William Longespée, 3rd Earl of Salisbury,[2]
[2] Chisholm, Hugh, ed. (1911). "Salisbury, William Longsword, Earl of" . Encyclopædia Britannica. 24 (11th ed.). Cambridge University Press. p. 78.
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Wikipedia
Around Christmas 1181, Ida de Tosny was given in marriage to Roger Bigod, 2nd Earl of Norfolk by Henry II, together with the manors of Acle, Halvergate and South Walsham, which had been confiscated from his inheritance after his father's death (Hugh Bigod, 1st Earl of Norfolk).[5] Ida and Roger had a number of children including: