When Alexander McLagan Buttar was born on 13 February 1872, in Longforgan, Perthshire, Scotland, United Kingdom, his father, Charles Buttar, was 30 and his mother, Susan McLagan, was 27. He married Elizabeth or Eliza Clark on 8 February 1895, in Barrhead, Renfrewshire, Scotland. They were the parents of at least 1 daughter. He lived in Barrhead, Renfrewshire, Scotland, United Kingdom in 1901. He died on 9 August 1920, at the age of 48, and was buried in Barrhead, East Renfrewshire, Scotland, United Kingdom.