Edmund de Lacy, Earl of Lincoln (c. 1230–1258) was an important landholder in Northern England, with a strategic manor at Stanbury which was important for east–west communication, and as Lord of the Honour of Pontefract he possessed Pontefract Castle.
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Origins
Edmund was the son and heir of John de Lacy, jure uxoris Earl of Lincoln (c. 1192–1240) 8th Baron of Halton, 8th Hereditary Constable of Chester, and feudal baron of Pontefract. His father was one of the 25 barons who forced John, King of England to sign Magna Carta in 1215. Edmund's mother was Margaret de Quincy, suo jure Countess of Lincoln (c.1206–1266).
Earl of Lincoln
There is doubt as to whether Edmund de Lacy became Earl of Lincoln, as he predeceased his mother, but not his father. The Complete Peerage gives him as the 3rd Earl, but notes that "he does not appear to have been formally invested with the earldom, presumably because his mother outlived him". Although he signed as Constable of Chester on documents, contemporaries would refer to him as Earl of Lincoln and he is known to have held the estates of the earldom.