Earl of Lancaster

The title of Earl of Lancaster was created in the Peerage of England in 1267, merging in the crown in 1399. See also Duke of Lancaster.

Earls of Lancaster (1267)

Name	Earl From	Earl Until	Relationship with Predecessor(s)
Edmund Crouchback 1st Earl of Lancaster	30 June 1267	5 June 1296
Thomas of Lancaster 2nd Earl of Lancaster	8 September 1298	22 March 1322	Son of Edmund Crouchback
Henry of Lancaster 3rd Earl of Lancaster	26 October 1326	22 September 1345	Brother of Thomas of Lancaster, son of Edmund Crouchback
Henry of Grosmont 4th Earl, 1st Duke of Lancaster	22 September 1345	23 March 1361	Son of Henry of Lancaster
John of Gaunt 5th Earl, 1st Duke of Lancaster	14 August 1361	3 February 1399	Son-in-law of Henry of Grosmont
Henry Bolingbroke 6th Earl, 2nd Duke of Lancaster	3 February 1399	30 September 1399	Son of John of Gaunt

Sources

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Prestwich, Michael (2007). Plantagenet England 1225–1360. Oxford: Oxford University Press. ISBN 9780199226870.
Somerville, Robert (1953). History of the Duchy of Lancaster. vol. 1. London: Chancellor and Council of the Duchy of Lancaster.
Walker, Simon (1990). The Lancastrian Affinity 1361-1399. Oxford: Clarendon Press. ISBN 0198201745.
Waugh, Scott L.; Harrison, B. (2004). "‘Henry of Lancaster, third earl of Lancaster and third earl of Leicester (c.1280–1345)". Oxford Dictionary of National Biography. Oxford: Oxford University Press. doi:10.1093/ref:odnb/12959.