Thomas L'Archer was the English Prior of the Order of St. John of Jerusalem : his incompetence left the order in severe financial difficulty.

He was from Tanworth in Arden in Warwickshire

Warwickshire

Warwickshire is a landlocked non-metropolitan county in the West Midlands region of England. The county town is Warwick, although the largest town is Nuneaton. The county is famous for being the birthplace of William Shakespeare...

, a younger son of John L'Archer and Margery Barniville. His father's family held Umberslade Hall

Umberslade Hall

Umberslade Hall is a 17th century mansion converted into residential apartments situated near Tanworth in Arden, Warwickshire. It is a Grade II* listed building....

 from the time of Henry II until the nineteenth century. Two of his brothers also entered the Church, while John L'Archers

John L'Archers

John L'Archers, or Larcher was an English born cleric and judge who had a distinguished career in Ireland, holding the office of Lord Chancellor of Ireland , but died during the first outbreak of the Black Death.- Family :...

, prior of the Order's Irish house in the 1340s, was probably his great-nephew.

In 1321 Thomas became English prior of the Order. He proved a most unfortunate choice:through age and financial incompetence he appears to have bankrupted the English house. The Grand Master of the Order set up an inquiry into the state of the English house: it recommended Thomas' removal on grounds of age. He died soon after on 28 August 1329.