Minna Keene, née Töneböne, (5 February 1859 – November 1943) was a German-born, self-taught Canadian pictorial portrait photographer, considered "hugely successful".

Caleb was a "decorator's apprentice" and brother of the landscape painter cum "photographic artist" Elmer Ezra Keene (1853–1929).

[5] Minna’s first mention in British photographic literature occurs in the late 1890s, when she is found submitting work (with some success) to competitions in the art journal The Studio and to a selection of regional photographic societies, including the Chelmsford Camera Club and Southsea Exhibition.

[5] After immigrating to Canada in about 1913, Keene was commissioned by the Canadian Pacific Railway to photograph the Rockies (1914–15) to market the mountain journey to tourists.

Keene won numerous prizes and established studios in South Africa and Canada; yet when she was featured in an article in Maclean's magazine in 1926, she was described as "a charming hostess" and a "home lover".