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The title of Earl of Gloucester was created several times in the Peerage of England. A fictional earl is also a character in William Shakespeare's play King Lear. See also Duke of Gloucester.
Earls of Gloucester, 1st Creation (1121)
- Robert, 1st Earl of Gloucester (1100–1147)
- William Fitz Robert, 2nd Earl of Gloucester (1121–1183)
- Isabel, 3rd Countess of Gloucester (d. 1217) held by husband after 1189, again by her in her own right from 1216 onward.
- Gilbert de Clare, 4th Earl of Hertford, 5th Earl of Gloucester (1180–1230), Isabel's nephew
- Richard de Clare, 5th Earl of Hertford, 6th Earl of Gloucester (1222–1262)
- Gilbert de Clare, 6th Earl of Hertford, 7th Earl of Gloucester (1243–1295)
- Gilbert de Clare, 7th Earl of Hertford, 8th Earl of Gloucester (1291–1314)
Earls of Gloucester, 2nd Creation (1299)
Earls of Gloucester, 3rd Creation (1337)
Earls of Gloucester, 4th Creation (1397)