Sir Lawrence of the "Illustrious" family of Crawford,Kilbirnie,Ayrshire,Scotland,married Helen, the daughter of Sir Hugh Campbell ofLoundon, ancestor of the earls of Loudon.On April 5,1529 he exchangedCrawford-John lands with Sir James Hamilton for lands inDrumry,Dumbarton. This was the progenitor of the Viscounts of Garnock(merged in the earldom of Crawford in 1749) and the immediate ancestor ofthe Crawfords of Jordanville, Renfrewshire.