Hi Thomas. I can give you quite a bit of info on the Kegos.
First off, your Isabel, the one that married Thomas Cuthbertson, was born on 12/03/1797. Her parents were James Kaigo and Agnes Mc Farlane. They had 6 children altogether:
William ( b1787), John ( b1789), Robert ( b1791), Ann ( b1794), Isabel ( b 1797), and James ( b1799).
I am descended from Robert, who married Margaret Marshall on 23/02/1810.
James Kaigo was born on 30/03/1766 to James Kego and Jean Mitchell. They were married on 14/06/1765. These two are the ones who have their name written on the stone lintel above the window of the cottage in Eaglesham. This is the picture on your profile. BTW, I believe that the cottage is owned by the National Trust for Scotland, but I have been unable to confirm that.
James Kego was born on 7/11/1731, and had a sister called Isabel, who was born on 1/11/1728. Their parents were James Keagow and Margaret Borland. We have now reached the extent of my knowledge of the Kego family.
The name Kego is quite interesting. I have not yet reached any conclusions, but I don`t believe that it is indigenous to Scotland. My father used to say that there was Huegenot blood in the family, but no proof was ever found. Also, the work for silkworm in Japanese is Kego. Now, the history of the Kegos seems to revolve around spinning and weaving, possibly even silk spinning. The Huguenots were also renowned as spinners and weavers in mainland Europe, and came over to Britain to escape religious persecution. Maybe, someone else can chip in here, but it may prove to be tricky one to solve.
I was in touch with a guy in South Wales a while back, who had an Uncle who was known as "Dai Jap", on account of his having" slitty eyes"! He was also related to the Kegos from Eaglesham.
Colin