He was born in County Dublin, son of John de Shriggeley senior. The de Shriggeley family are said to have been fairly recent arrivals in Ireland from Cheshire, and took their family name from the village of Pott Shrigley. , Cheshire
Marriage
In 1385 married he Nicola, daughter of Nicholas Bathe, and widow of Sir Simon Cusacke of Beaurepaire, who was a substantial landowner in County Meath. As the remarriage of a widow needed the Crown's consent, their marriage without a royal licence was technically an offence, but the couple quickly received a royal pardon, in consideration of John's "good service" to the Crown.
Inheritance
Nicola brought John a very substantial dowry, but they had considerable difficulty in asserting their rights to her lands at Culmullen in County Meath, the ownership of which was disputed by various relatives of Nicola's first husband. In 1393 Shriggeley and Nicola complained to the Crown that they had been unlawfully dispossessed of their lands for more than seven years. The dispute apparently turned violent over the following few years, as Shriggeley and one Geoffrey Cusacke were bound over in 1394-5 to be of good behaviour, to find men of good social standing to act as sureties for their good conduct, and to pledge to do no harm to each other. The Cusacke family continued the struggle to gain possession of Culmullen for at least another generation, long after Shriggeley's death.
Judge
Shriggeley was appointed second Baron of the Court of Exchequer in 1382. In 1385 he became Chief Justice of the Irish Common Pleas. He became Chief Escheator of Ireland in 1386, and at the same time he was made Chief Clerk of the Markets and Keeper of the Weights and Measures for Ireland. He stepped down as Chief Justice in 1388. He was a trusted servant of the Crown, and in particular enjoyed the confidence of Robert de Vere, Duke of Ireland, the prime royal favourite of King Richard II through much of the 1380s. However the Duke's downfall in 1388 does not seem to have harmed Shriggeley's career. In 1389 in consideration of his seven years good service in the "Irish wars" and in "diverse offices", he was given a knighthood and granted lands at Drogheda.
Murderer
It was no doubt his good services to the Crown which led to his being pardoned in December 1389 for killing Nicholas Cusacke and Richard Cormygan: he was pardoned after a plea for mercy from Geoffrey Vale. Little is known of the details of the murders, although Nicholas's surname suggests that it was connected with the long-running dispute over possession of the former Cusacke lands in County Meath, which were held by Shriggeley in right of his wife. The violence of this dispute, which continued for many years, even after Shriggeley's death, was a cause of great concern to the Crown in the 1390s.
Last years
In 1390 he was granted the lease of "the watermill below Dublin Castle". He was still alive in 1403 when he was described as living at Skryne, County Meath. In the same year he was appointed Captain of the Militia, Keeper of the Peace and a member of the Commission of Array.
