Oneil is a distinctive boys' name in United States, ranking #4215 in 2007 with 24 recorded births. This places Oneil in the top 29% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1996 with 26 births ranking #2889. In 2007, approximately 1 in every 86,468 boys born was named Oneil. FALLING Recent data shows the name is currently falling.