Phineas is a distinctive boys' name in United States, ranking #2679 in 2004 with 40 recorded births. The name reached its all-time peak in 2016 with 142 births ranking #1284. Since 1996, the popularity has increased by 400.0%. In 2004, approximately 1 in every 49,620 boys born was named Phineas. STABLE Recent data shows the name is currently stable.