Arthur Johnston of Rademon, J.P., barrister-at-law, was M.P. for Killyleagh and Old Sarum and High Sheriff for Co Down (1818). He was a Major in the North Down Militia.

Arthur Johnston CRAWFORD before his death, agreed with his father, John CRAWFORD of Crawfordsburn and of Rademon, Co Down, to break the entail in favour of his sister, Mabel Fridiswid (who was married to William SHARMAN), otherwise the property would have passed to John Crawford's brother, Captain Arthur CRAWFORD.

He died, unmarried, and was buried at Kilmore. Belfast Newsletter 20th October 1826

(see William SHARMAN-CRAWFORD for further details.)