Alexander (Roy) Mcdonell was born abt 1769 in Scotland(?). In 1785 he and his wife (name unknown, b abt 1763) lived in Charlottenburgh with no Children. Between 1790 and 1801 they had eight children the last one being Hugh. This is a UEL family and each of the kids received 200a.
abt 1799 his son Donald (my gggrandfather) was born. In 1823 or so Donald married Sarah Cameron in East Nissouri, Oxford and from there I can trace the family to my brother and myself.
I'm wondering if your Hugh, father of your gggrandfather? I've found some info on them but can't confirm the connection to Alexander (Roy). I assume "Roy" is a nickname.
Realize it's been awhile since your post here, hopefully we'll be able to exchange useful information