Neary, ó Nárdhaigh A Gaelic surname meaning descendant of Náradhach meaning ‘good, noble’. A sept of Connacht. In 1890 the surname was principally found in Mayo, Roscommon, Dublin and Louth, and the estimated number of bearers was 1,930. In the United States it is the 6,898th most numerous surname with an estimated 5,500 bearers.