I have the following information about the PEI Dewars, some of whom on my mother's side of the family trace back to a Margaret Dewar, and a Donald Dewar.
According to our info, Margaret Dewar was born around 1770, probably in Breadalbane, Perth, Scotland, and came to Queen's County PEI, possibly 1808, wife of Duncan Campbell. (See Margaret, daughter of Donald, below).
We directly descend from a Donald Dewar from Deell (sp?) parish, Perth, Scotland, who came to Kings County PEI before 1820. He married Elizabeth Irving in June 1782. Children: Duncan (1784), Margaret (1787), John (1789), Donald (1792), Robert (1802), Betty (1804), Jessie (?).
There is a gap in our info afterwards until the PEI 1841 Census which reveals only 6 Dewars, one of whom is Donlad (Donald?), farmer, on Lot 52 (which is in Kings County near Montague, where my own great-grandfather James Dewar b.1865-d.?, grandfather Robert Hammond Dewar b.1894-d.1973 and my mother Gwen Dewar b.1924 were born).
We are travelling back to PEI (from Ontario and Newfoundland) this summer 2002 to find out more. My mother Gwen is making her first return trip since 1930!
I look forward to hearing from anyone who has information on the Dewars of Kings County (formerly Lot 52) and Queens County PEI.