This has been my brick wall for years. I am desperate to tear down the wall! Please help if you are able...
I believe he was born circa 1806 in Scotland. William married Jean (Jane) Calder on 24 January 1830 in Barony Parish, Lanarkshire, Scotland. They had 5 children born between 12 June 1828 and 27 March 1836, all baptized in Barony Parish. He is listed as being a Mason in Maryhill, Stockingfield, Wyndford and Springbank prior to emigrating from Scotland to Ontario, Canada.
I was given a copy of a family story written by his granddaughter Jennie, in the late 1800's, that fills in many gaps in our family history, including a possible family connection to a Moses Buchanan - ship builder and shipping agent with an office on Buchanan Street in Glasgow. This connection is based on a letter her father (John Calder Buchanan) received from Moses, claiming kinship and recalling particular shared memories and time spent together in their younger years. His granddaughter Jennie, thought she recalled that Moses was a cousin to her father (nephew of William), but it seems unlikely he is a literal 1st cousin to her father as that would make William Buchanan's mother (Agnes Youle) in her mid to late 50's when he was born. Not impossible, but not altogether likely either. I could not find a record for such a thing anyhow so I have tentatively ruled that out. I figure that in this case 'cousin' might mean 2nd cousin or something a bit more loose than a 1st cousin relationship. I have been able to find the parents and birth of Moses Buchanan but have yet to find the connection to my William Buchanan aside from the description in Jennie's family story of the letter sent from Moses to William's son John Calder Buchanan.
William died in Ontario, Canada 20 August 1882. His parents and a birth date are not listed. The death filing I found simply states he was 76 years old with an estimated birth year of 1806.