McGill/Gillan
I have a copy of the Death Certificate of my great, great grandfather, Hugh Gillen. He died in the Combination Poorhouse in Dunbarton, Scotland. On that, it states that his father was Thomas Gillan and his mother's maiden name was Margaret McGill.
I believe that Hugh was born in Donegal, Ireland.
Any chance my McGill is related to your McGill???
Regards
Wee Ann