Spiro is a distinctive boys' name in United States, ranking #10485 in 2002 with 6 recorded births. The name reached its all-time peak in 2008 with 10 births ranking #8222. Since 1996, the popularity has decreased by 33.3%. In 2002, approximately 1 in every 323,579 boys born was named Spiro. FALLING Recent data shows the name is currently falling.