Descended from John Carson (Ireland/Dondonald Scotland) & Mary Haslett (Ireland/Dundonald) via their son William...near as I can tell, William & Thomas were brothers (not sure who exactly was eldest, but I think William when looking at Scottish Census data in Ayr from 1881). At any rate, I found marriage records for John & Mary in Ireland, and it looks like John's father was Thomas, not John, despite what you've indicated and what I saw in John's Scottish Death record...often some of these records are not entirely accurate as other family members may not be familiar with grandparent & ggrandparent first names. Still I'm 95%+ certain that these connections look right, & I'd like to close on the last 5%.