Hi Annie,
Thanks for your reply!
It’s the maternal side of my family.
My grandfather, Alan Graham Smith, was born in Glasgow, Scotland, and died in 2017 in Melvern Square, NS, Canada. He emigrated to Canada in the late 40s, from Mouswald where he lived.
He was the illegitimate son of Janet Graham Smith and our mystery man. Janet Smith lived in Lochmaben. Her parents were James Graham Smith and Mary Jane McMinn, and her siblings were Jean, Graham, and Robert Swan.