Onéra Amelia Merritt-Hawkes (15 February 1877 – 19 July 1951) was an American-English zoologist, eugenicist, traveller and writer. Born in New York City, she moved to England where she lived for most of her life. In 1935 she published an account of her travels in Persia (current day Iran) and the next year she wrote on her travels through Mexico. From 1940 she went by the name of Mary Weston in the books that she wrote.