John Sempill, 1st Lord Sempill

John Sempill was the founder of Castle Semple Collegiate Church near Lochwinnoch.

Lord Sempill's father, Sir Thomas had been killed fighting for James III of Scotland at the battle of Sauchieburn.

John built another chapel at Southannan in West Kilbride parish.

[1] James IV of Scotland was entertained by Lord Sempill's harper at Paisley on 30 June 1504.

[2] Next year, the King visited Sempill's house at Eliotston and the collegiate church.