<Tr> <Td> </Td> <Td> Murphy </Td> <Td> Ó Murchú </Td> <Td> Ó Murchadha Mac Murchaidh </Td> <Td> Descendant of Murchadh (a personal name meaning "Sea hound / warrior") </Td> </Tr> <Tr> <Td> </Td> <Td> (O') Kelly </Td> <Td_colspan="2"> Ó Ceallaigh </Td> <Td> Descendant of Ceallach ("strife") </Td> </Tr> <Tr> <Td> </Td> <Td> (O') Sullivan </Td> <Td_colspan="2"> Ó Súilleabháin </Td> <Td> Descendant of Súilleabhán ("dark - eyed one", "one - eyed" or "hawk - eyed") </Td> </Tr> <Tr> <Td> </Td> <Td> Walsh </Td> <Td> Breathnach </Td> <Td> Breatnach </Td> <Td> "Breton", "Welshman" </Td> </Tr>

What's the most popular surname in ireland