POWLETT (formerly VANE), Hon. William John Frederick (1792-1864), of Langton Grange, co. Dur.; Somerby, Leics. and 19 Curzon Street, Mdx.

b. 3 Apr. 1792, 2nd s. of William Harry Vane†, 3rd earl of Darlington (d. 1842), and 1st w. Lady Catherine Margaret Powlett, da. and coh. of Harry Powlett†, 6th duke of Bolton; bro. of Henry Vane, Visct. Barnard* and Hon. Harry George Vane†. educ. Brasenose, Oxf. 1809. m. 3 July 1815, Lady Grace Caroline Lowther, da. of William Lowther†, 1st earl of Lonsdale, s.p. styled. Lord William John Frederick Powlett 1827-64; took name of Powlett by royal lic. 20 Apr. 1813 in compliance with the will of his maternal grandmother Katherine, dowager duchess of Bolton (d. 21 Mar. 1809); suc. bro. Henry as 3rd duke of Cleveland 18 Jan. 1864 and resumed name of Vane by royal lic. 4 Mar. 1864. d. 6 Sept. 1864.