James Kelly

James Kelly of County Meath married Mary Maher, a native of County Kilkenny, in Quebec City, Quebec, Canada in 1829. In the church record, his parents are listed as James Kelly and Margaret Beckive or Bective. I have found marriages for, I believe, his three brothers - Peter, Patrick and Michael. The mother's surname is written as Beckhof, Becket, and Backhof. Margaret and James, the parents, must have immigrated to Quebec too as I found a death for Margaret Backhoff, wife of James Kelly,  in 1830 in Quebec. In searching the Tithe Applotments and Griffith's valuation, I couldn't find any surname for Margaret such as those listed above. I did find the name Betagh in the parishes of Teltown and Kells in Griffith's. I am wondering if it's possible that this may be Margaret's maiden name. If an Irish speaking person was telling a French Canadian priest her name, I think it could be that Betagh could sound like any of the above although I am not certain of the pronunciation in Ireland. I have read that the name has evolved into Beatty or Beattie. I am wondering if the name Betagh still exists in Ireland or if anyone has any knowledge of this name in County Meath. Any help or suggestions would be greatly appreciated. Thank you very much.