Phineas is a distinctive boys' name in United States, ranking #2600 in 2005 with 43 recorded births. The name reached its all-time peak in 2016 with 142 births ranking #1284. Since 1996, the popularity has increased by 437.5%. In 2005, approximately 1 in every 46,445 boys born was named Phineas. STABLE Recent data shows the name is currently stable.