Hi superhoop,
We believe his name is John Kilchrist. However surname variances could be Gilchrist, Killchrist, Killgrass, Gilbriest.
Somebody put me onto a John Gilchrist born in Philadelphia in 1758. I have found a few members of the family, but nobody seems to know anything about what happened to him. So what we are wondering is if he is "ours" and the reason the family don't know anything about him is because he returned to England.
Thanks
Nedda