Are you still there? Saw your post on a search for Dreghorn (the place). There can't be that many Stirretts in Ayrshire, can there? I'm trying to trace back a Margaret Stirret, apparently born 1766 in Stevenston, Ayr. She married Alexander Watson in Dreghorn in 1788. Her parents appear to be John Stirrat and Margaret Johnston. They apparently married 1760 in Dalry, Ayr. A search for possible parents of John on the FamilySearch IGI turned up only 3 possibles, all of which somewhat unlikely: James Stirrat and Jean Bell (John 1729 Dalry), John Starret and Janet Tailor (John 1730 Kilwinning), and John Sterrat and Elizabeth Anderson (John 1743 Beith).

Just thought I'd add these names to the general confusion.