1. Aveline married James de St. Hilary.
James de St. Hilary and Aveline had the following children:
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2. Maud de St. Hilary, daughter of James de St. Hilary and Aveline, was born circa 1133. She died on 24 December 1193. She married Roger de Clare, 3rd Earl of Hertford.
Roger de Clare, 3rd Earl of Hertford, son of Richard Fitzgilbert de Clare, 1st Earl of Hertford (1094-1136), was born in 1116 in Tonbridge, Kent. He died in 1173 in Oxfordshire. He and Maud de St. Hilary had the following children:
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3. Richard de Clare, 4th Earl of Hertford, son of Roger de Clare, 3rd Earl of Hertford and Maud de St. Hilary, was born in 1162. He was an Owner of Tonbridge Castle. He married Amice FITZROBERT circa 1172. He died on 30 December 1218.
Richard de Clare, 4th Earl of Hertford (1162 – December 30, 1218) was the son of Roger de Clare, 3rd Earl of Hertford and Maud de St. Hilary. More commonly known as the Earl of Clare, he had the moiety of the Giffard estates from his ancestor Rohese. He was present at the coronation of King Richard I at Westminster, 3 Sep 1189, and King John on 27 May 1199. He was also present at the homeage of King William of Scotland at Lincoln.
He married (ca. 1172) Amice Fitz William, Countess of Gloucester (ca. 1160-1220), second daughter of William Fitz Robert, 2nd Earl of Gloucester, and Hawise de Beaumont. He sided with the Barons against King John, even though he had previously sworn peace with the King at Northampton, and his castle of Tonbridge was taken. He played a leading part in the negotiations for Magna Carta, being one of the twenty five Barons appointed as guardians. On 9 Nov 1215, he was one of the commissioners on the part of the Barons to negotiate the peace with the King. In 1215, his lands in counties Cambridge, Norfolk, Suffolk and Essex were granted to Robert de Betun. He and his son were among the Barons excommunicated by the Pope in 1215. Sometime before 1198 Earl Richard and his wife Amice were ordered to separate by the Pope on grounds of consanguinity. They separated for a time because of this order but apparently they reconciled their marriage with the Pope later on. His own arms were: Or, three chevronels gules.
Amice FITZROBERT, daughter of William FitzRobert, 2nd Earl of Gloucester (1116-1183) and Hawise de Beaumont of Leicester ( - ), was born circa 1160. She died in 1220. She and Richard de Clare, 4th Earl of Hertford had the following children:
| 4 | Gilbert de Clare, 5th Earl of Hertford (1180-1230). Gilbert was born in 1180. He died on 25 October 1230. |