MacKay Genealogy and MacKay Family History Information

Im looking for more infomation about frank mackay and his background , all i know was that he was married to margaret lordon , after she died , he left the children with margaret s mother and father... he left behind gary , judy, and sandra . they were ages five, two and one .. if anyone has info on him i would appreciate it.. location last heard was in toronto , ont ,canada telegram sent in 1961 saying he died of heart attack this is only info i have..