Isabella, I am a descendant of the Sandfield Macdonald family (quite an interesting political family to the say the least)My own family came in 1786 (Allan Macdonald of Sandfield) but perhaps other family arrived later in 1792. A brother of Allan - John, and a nephew Ranald were named as also being on the Ship, Macdonald or Sandaig, 1786. There is a reference to an "Angus the Deputy" being married into the Sandfield family. Other possibilities include MacBean,MacBain/MacGillis marriages. etc.
I have not checked my database on info as I just returned to town. If you provide additional info I'll see if it fits. I suggest visiting Glengarry County Genweb if you have a chance as it has man relevant documents.
Evelyn Goulet, Castle Tioram
Clan Donald International
Host, Glengarry County Genweb