Siaosi is a distinctive boys' name in United States, ranking #7427 in 2011 with 11 recorded births. The name reached its all-time peak in 2015 with 13 births ranking #6622. Since 1996, the popularity has increased by 83.3%. In 2011, approximately 1 in every 172,635 boys born was named Siaosi. FALLING Recent data shows the name is currently falling.