Phineas is a distinctive boys' name in United States, ranking #1664 in 2015 with 95 recorded births. The name reached its all-time peak in 2016 with 142 births ranking #1284. Since 1996, the popularity has increased by 1,087.5%. In 2015, approximately 1 in every 20,171 boys born was named Phineas. STABLE Recent data shows the name is currently stable.