Leavy, Levy, Mac Con Shlíbhe, A Gaelic surname meaning ‘son of the hound of the mountains’. A sept of Anaghaile (Annaly). In 1890 Leavy was numerous in Westmeath, it was also to be found in Longford. The estimated number of bearers for was 1,388 (including variants). In the United States Levy is the 872nd most numerous surname with an estimated 38,500 bearers.