This spirited Gaelic classic, which became popular in Ireland via the illustrious twelfth century king Rory O'Connor, makes a highly energetic choice, now used for either sex. Rory's gender split is still trending boyward. For boys, the name came in at Number 378 in 2015 and only at Number 679 for girls, compared with a near-even split just a handful of years ago.
In England and Wales, however, where Rory ranks in the Top 100 for boys, the name is virtually never given to girls. It's seen as thoroughly male (and non-female) as Roger or Richard.
Rory first came to attention in the US in the person of mid-century pin-up boy Rory Calhoun (born Francis Timothy). The name entered the popularity list in 1947, peaking at Number 280 in 1959.
Young Irish U.S. Open champ Rory Mcllroy makes a worthy namesake. Bill and Melinda Gates chose Rory as the name of their only son.
Rory is a Top 100 name for boys in England and Wales, a Top 40 name in Scotland and is also well used in Ireland. Skip baffling Gaelic spellings like Ruari and Ruaidhri and stick with the more straightforward Rory.