Gilbert de Clare, 6th Earl of Hertford, 7th Earl of Gloucester was a powerful English magnate. He was also known as "Red" Gilbert de Clare or "The Red Earl", probably because of his hair colour or fie
Douce Apocalypse, c. 1265–70. The dragon, who is Satan, comes forth again (Rev. 20:7). Among the flags of the host of Satan is that of Gilbert de Clare, Earl of Gloucester, who had opposed Henry III.
Simon de Montfort, 6th Earl of Leicester, in rebellion against Henry III, dies at the Battle of Evesham.