JD
John de Lacy
d. 1240
Vitals
Died
1240
Family
Spouse
Children
About
John de Lacy, first Earl of Lincoln, was one of the twenty-five sureties of Magna Carta and Constable of Chester. His daughter Maud married Richard de Clare, Earl of Gloucester, which brings a fourth surety line into this family.
Research notes
✓ DOCUMENTED (web-confirmed 25 Jul 2026; Magna Carta Trust): JOHN DE LACY, 1ST EARL OF LINCOLN, Constable of Chester, Baron of Halton and Pontefract (c.1192-1240) - ONE OF THE TWENTY-FIVE SURETY BARONS OF MAGNA CARTA (1215). Son of Roger de Lacy; m. Margaret de Quincy, in whose right he became Earl of Lincoln 1232. Father of Maud de Lacy (our line, wife of Richard de Clare 5th Earl of Hertford/Gloucester). Direct ancestor - a Magna Carta surety. Added 25 Jul 2026.