Phineas is a distinctive boys' name in United States, ranking #1432 in 2020 with 121 recorded births. The name reached its all-time peak in 2016 with 142 births ranking #1284. Since 1996, the popularity has increased by 1,412.5%. In 2020, approximately 1 in every 14,257 boys born was named Phineas. STABLE Recent data shows the name is currently stable.