Alexander Lowson Keillor (20 October 1869 – 16 June 1960) was a Scottish footballer, who played for Montrose, Dundee and Scotland, being capped six times between 1891 and 1897.^[1][2]

Born in Dundee, Keillor is one of only two men to be selected for Scotland while playing for Montrose, alongside George Bowman who was a teammate in 1892.^[3][4] Keillor joined Dundee at the club's inception in 1893, and would set a number of firsts for the club during his lengthy stint there.^[5] He would play in Dundee's first ever competitive match in a league game against Rangers on 12 August 1893,^[6] was among the first Dundee players (alongside fellow Dees Frank Barrett and William Longair) to be capped by Scotland in 1894,^[7] and was the first Dundee player to score for Scotland in 1896.^[8]