Murphy - Baby Name Meaning, Origin, and Popularity
This jaunty Celtic surname -- the most common family name in both Ireland and the US -- is totally viable as a first. The arguably most famous Murphy is TV's Murphy Brown, and indeed the name is twice as common for baby girls as for baby boys today. But still, it's solidly gender neutral and works equally well for all sexes.
There have been countless notable surnamed Murphys, including the currently prominent Eddie and Cillian. Murphy was the eponymous protagonist of Samuel Beckett's first published novel.
One possible negative: the association with Murphy's Law--if anything can go wrong, it will.