Byrnes \b(y)-rnes, byr-nes\ as a boy's name is a variant of Burns (Middle English), and the meaning of Byrnes is "brook".

The baby name Byrnes sounds like Barnes, Bernis and Burnis. Other similar baby names are Byrne, Barney, Barnet, Berne, Birney, Burney, Byrn, Burne, Borne, Burges, Burnel, Burnet, Bernet and Byren.