Gilbert de Clare was a prominent English nobleman in the 13th century, born around 1180. He was the son of Richard de Clare, the 6th Earl of Hertford, and inherited significant lands and titles. Gilbert played a key role in the political landscape of his time, aligning with various factions during the conflicts between the monarchy and the barons. He became the Earl of Gloucester and was known for his military involvement, particularly in the Barons' War against King John of England. Gilbert's legacy continued through his descendants, influencing the power dynamics of medieval England.