Roger de Clare, 1st Earl of Gloucester, was a prominent English nobleman born around 1090. He was the son of Gilbert de Clare, a powerful lord, and Adeliza de Clermont. Roger played a significant role during the reign of King Henry I and was known for his military leadership and loyalty to the crown. He was granted the title of Earl of Gloucester in 1121, which solidified his status among the English nobility. Throughout his life, Roger de Clare was involved in various conflicts and political matters, including the struggle for power between the Angevin and Norman factions. He married Adeliza of Louvain, the widow of King Henry I, which further strengthened his influence. Roger passed away in 1173, leaving behind a legacy as a key figure in medieval England.