these are books written by several different authors, not govenment books at all! Some list any court cases regarding the Scottish families, I think James Maidstone is the main author here, he was a lawer.
If you have a good family history society they may have some of them....otherwise its a case of getting in touch with the family history department at the Mitchell or the special collections and I would have to go through each one to see if I can find any details.
But you are correct in that the Carrick Kennedy family 'ruled' the area from Stranrae to just above Ayr and inland up into the southern uplands.....including the three rising points of the river Clyde itself. So much later on in time the Kennedy's were very much involved in shipbuilding and had a strong influence in Glasgow.
Get in touch with me directly if you want more help and we can come to some arrangement.