macklin was married in 1890 to barbara emily main, the daughter of george john masters main and his wife, emily mariah (née hayter). she was born in 1870. she was appointed member of the order of the british empire (mbe) in 1919 for work among colonial and british troops during the first world war and was awarded the golden palms of the order of the crown, by the king of the belgians in 1921 for work among belgian refugees during the same conflict. she died in salisbury on 19 november 1960.