Of Anglo-Norman extraction, the Kerrs settled in the Scottish Borders in the thirteenth century. The Ferniehurst branch of the family, which included the Ancram line, had a long tradition of rivalry with their distant cousins, the Kerrs of Cessfurd, one of whom, the future 1st earl of Roxburgh, had the infant Kerr’s father murdered at Edinburgh in 1590. The resulting feud was not settled until 1606, by which time Kerr had entered Scottish local government as provost of Jedburgh.
During the 1621 Parliament a bill was introduced to naturalize Kerr, but although it passed the Lords in May it was subsequently lost in the Commons.
Despite rumours in October 1625 that Buckingham wished to deprive him of his offices, Kerr preserved his central role at Court as keeper of the privy purse.
For the next decade Kerr’s position at Court remained secure. In 1629 he carried Charles’s condolences to his sister, the queen of Bohemia, following the death of her eldest son. He was doubtless instrumental in obtaining for his own firstborn son, William (Carr)*, the earldom of Lothian in 1631, and two years later he himself was created earl of Ancram while in Edinburgh for the king’s Scottish coronation.
More seriously, by 1639 Lothian had emerged as a leader of the Scottish Covenanters. This development probably explains why Kerr lost his keepership of the privy purse that year; certainly it marked the start of his gradual estrangement from the king. Although he technically retained his privy chamber post until at least 1643, Kerr remained in London at the outbreak of the Civil War and royalist troops confiscated his Somerset rents. Although Parliament acknowledged an obligation to pay his pensions, his case was scarcely a priority, and by 1645 he was obliged to seek the protection of the House of Lords against his creditors. In 1649 he returned to Scotland, but in the following year, perhaps prompted by Cromwell’s invasion, he fled to the Netherlands. There he dragged out his final, poverty-stricken years, dying intestate in Amsterdam in December 1654. His Dutch creditors initially impounded his corpse, but Cromwell redirected some funds owing to Lothian to cover the funeral expenses.
