Earl of Lincoln (1232-1240).
Constable of Chester.
Lord of Halton Castle.
Lord of Pontefract (1211-1240).
John de Lacy was the son of Roger .

John is one of the “Surety Barons” named for the enforcement of the Magna Carta signed by King John of England in 1215.

JOHN de LACIE, the Surety, born 1192, seventh Baron of Halton Castle and hereditary constable of Chester, was one of the earliest Barons to take up arms at the time of Magna Charta. He was also appointed to see that the new statutes were properly carried into effect and observed in the counties of York and Nottingham. He was excommunicated by the Pope. Upon the accession of King Henry III, he joined a party of noblemen and made a pilgrimage to the Holy Land, rendering valuable service at the Siege of Damietta.

In 1232 Lacie was made Earl of Lincoln and, in 1240, governor of Chester and Beeston Castles. He died 22 July 1240, and was buried in the Cistercian Abbey of Stanlaw in co. Chester. The monk, Matthew Paris, records: "On the 22d day of July, in this year (1240), which was St. Magdalen's Day, John, Earl of Lincoln, after suffering from a long illness went the way of all flesh." His first wife was Alice, daughter of Gilbert 'd’Aquila, but by her he had no issue. She died in 1215 and he married second, after his marked gallantry at the Siege of Damietta, Margaret, only daughter and heiress of Robert de Quincey, a fellow Crusader, who died in the Holy Land, eldest son of Saire de Quincey, the Surety. They had three children, Lady Margaret survived him and married second Walter Marshall, Earl of Pembroke.