Mary Christian Dundas Hamilton (24 May 1850 - 10 June 1943) was a Scottish writer and poet.

Hamilton's verse was printed in The Times of London in 1915 and was also included in the anthology A Book of Verse of the Great War by W. Reginald Wheeler, published by Yale University in 1917.

[3][4] She grew up in Ayrshire and moved to Sussex, England, where she lived until her death in 1943, leaving an estate worth £5781.

She wrote A Hymn for Aviators in 1915, a poem that was adapted at various times and given different titles.

It was known as "Lord, Guard and Guide the Men Who Fly"[7] and also as "United States Air Force Hymn", it first appeared in the American Student Hymnal in 1928 and was set to Mozart's "Dona Nobis Pacem".