Gilbert FitzRichard de Clare, 1st Earl of Hertford, was Lord of Clare and created 1st Earl of Hertford by Stephen, King of England.
Background
Gilbert was the eldest son of the Richard Fitz Gilbert de Clare and Adeliza. His mother Adeliza was the daughter of Ranulf le Meschin, 3rd Earl of Chester and Countess Lucy as well as the sister of Ranulf de Gernon, 4th Earl of Chester. Gilbert, who was born before 1115, succeeded his father to the honor of Clare including Tonbridge Castle on 15 April
Career
He was a supporter of King Stephen for a time, but seems to have joined the Empress Matilda at some point. In 1147, Ranulf de Gernon, rebelled against King Stephen again. The king, in turn, seized Gilbert, the Earl of Hertford, and held him prisoner until he agreed to surrender all his castles.
When Stephen refused, Gilbert the Earl of Pembroke also joined Ranulph"s rebellion.
Stephen then confiscated his castles as well. Not long after, however, the king reconciled with both Gilberts, however Ranulf de Gernon joined Henry of Anjou (later Henry II of England).
Gilbert died unmarried and without issue in 1152 and was buried at Clare Priory.