Phineas is a distinctive boys' name in United States, ranking #1718 in 2007 with 88 recorded births. The name reached its all-time peak in 2016 with 142 births ranking #1284. Since 1996, the popularity has increased by 1,000.0%. In 2007, approximately 1 in every 23,582 boys born was named Phineas. STABLE Recent data shows the name is currently stable.