My 3X great grandfather was Roderick Dewar who settled on Lot 14 Concession 4 in Harrington, Argenteuil, Quebec in the 1830s. Based on census records he was born somewhere in Ontario about 1801 and was married to Agness who was born in Scotland about 1802. They were enumerated in Harrington in 1842 and 1851. They had 8 children including: William, Donald, John and Catherine. I have not found a record of his birth, marriage or death. 

It is possible that my ancestor Roderick's father was John Bane Dewar mentioned on page 15 of “The MacLoers of Galder Glenelg A genealogy study of the Dewar's of Glengarry Ontario” researched and published by Donald Keith Dewar in Thorold, Ontario, as quoted below:

“(A) JOHN BANE DEWAR and his wife Catherine MacLennan (b.1771), came from Glenelg Scotland, on the very first boatload of Highland settlers to Glengarry County, along with 40 other families. They left Greenock in April of 1793, and arrived in Prince Edward Island with a foot of snow on board the ship. They stayed all winter there, and in April of 1794, they finally arrived at their new lots of land, in the north half of the County of Glengarry. John Bane Dewar received 200 acres on lot 29 of Concession 7, just west of the present day "Kirk Hill West Church", in an area first known as Glenelg. Received the deed for this farm n July 7/1828. He died in 1844.
(AA) WILLIAM - may have been the first child, since John Bane sold the west 100 acres to William in 1828.
(AB) RODERICK - appeared to have had a falling out with his father and left the farm. Did not receive any land upon his father's death, but the other brothers had to give him a gift of 50 pounds sterling, his share of the will. May have moved to Lot.07/Con.03 Lochiel, 200 acres, purchased (deed) Feb.12/1850
(AC) Angus (b. 1803)
(AD) Donald John (b. 1804)”

Support for this theory is similarity of their presumed birth years and the likely time period when one Roderick left home and the other settled elsewhere. There is also similarity of family member names (although they were very common names), and the physical and cultural proximity of of Glengarry and Argenteuil Counties. The possibility that John Bane's son Roderick may have bought land in 1850 in Ontario while my ancestor Roderick was enumerated in Argenteuil in 1851 contradicts my theory. 

The author of the “The MacLoers of Galder Glenelg”, Donald Keith Dewar has died and I am unable to find any other information about John Bane and his son Roderick. 

I would appreciate any suggestions that would get me over my “brick wall”.

Thanks,
Barry Peers

Hi, I have a small amount info as I have not concentrated much on the Dewar name but I really hope it can help. Here we go:

I am thinking your Dewar family and mine could be related.
My gg grandmother is Catherine McCuaig McNamara, her mother is Sara Dewar (Dewar is her maiden name.) Donald McCuaig is her husband.

In 2008 in conversation with another ancestry member (not confirmed by me.) I was told that Sara and Donald were Married in March 1824 in Lochiel Twp Glengary ON.

What I also found interesting is that the McCuaig family is from Glenelg, Scotland and departed on the Baltic Merchant in 1815 this info I found myself online on "theclearances.org"

As far as I know Sara and Donald stayed in Canada.
Catherine and her husband and children moved to the states.

My family tree is on Ancestry under my grandfather: Reginald McNamara (if you think it maybe helpful)

I hope there was something I gave you that could break that darn brick wall!

Best of luck.

Hiya, thanks for getting back. I'm sure there is a Dewar connection between us and perhaps McQuaig one as well. As my 3x gg-grandmother was also a Catherine McCuaig, born in 1809 in Glenelg and married to Roderick Oag McLeod.

I will have a closer look at your McNamara Family Tree and see what I can see and will get back to you. 

In the meantime I think your Sarah Dewar may be more directly connected to the family at this link than to mine.

http://www.mocavo.com/family-tree/David-McLellan/Genealogy-o...

Thanks for the information you've provided already,
Barry