Louis Auldjo (6 November 1855 – 25 June 1943) was a Scottish rugby union international who represented Scotland in the 1877–78 Home Nations rugby union match against England.Auldjo was born in Cawnpore, now Kanpur, in India.
His family had military connections, hence the Indian birthplace, but the Auldjo family were a well-known Dundee family.
His father was John Richardson Auldjo and his mother Mary Anne Carnegy