Page 554 – Sir William Sempill, Knight, of Letterkenny, in Ireland, who was a J.P. for County Donegal in 1629. On 23 May 1639, along with Sir George Hamilton of Donalong, Baronet, Sir George Hamilton of Greenlaw, and Sir William Stewart of New Stewarton, he had a grant of the manor of Strabane and the rest of the Abercorn estate. He appears to have married Anne, younger daughter of Sir William Stewart, Baronet, sometime of Dunduff, Ayrshire, and of Ramalton, County Donegal, Ireland, by whom he had an only daughter, Francelina, who appears to have been married to Sir Charles Hamilton of Killishandra, County Caven.