William Constable-Maxwell, 10th Lord Herries of Terregles (25 August 1804 – 12 November 1876) was a Scottish peer and a landowner in England and Scotland.
[1] His father died young, and in 1823 Constable-Maxwell was owner of the Yorkshire estate and was living at Everingham Hall with his widowed mother.
[2] His father was the son and heir of William Haggerston, later Haggerston-Constable, of Everingham Park, by his wife Lady Winifred Maxwell (only surviving daughter and heiress of Hon.
John Maxwell, Master of Nithsdale, son and heir apparent of William Maxwell, 5th Earl of Nithsdale, 9th Lord Herries of Terregles, by his wife Lady Winifred Herbert, a daughter of William Herbert, 1st Marquess of Powis).
[3] [1] By an Act of Parliament in 1848, the descendants of the 5th Earl of Nithsdale were "restored in blood" to the Lordship of Herries of Terregles, but not to the earldom, and on 23 June 1858 the House of Lords allowed the peerage to Constable-Maxwell.