Menna Patricia Humphreys Gallie was a Welsh novelist and translator. She was born in Ystradgynlais. She married the philosopher W. B. Gallie in 1940, with whom she had a son and a daughter. She is best known for her novels in the English language, and as the translator of Caradog Prichard's Un Nos Ola Leuad, under the title Full Moon.