Sian is a distinctive girls' name in United States, ranking #6057 in 2007 with 23 recorded births. The name reached its all-time peak in 2006 with 35 births ranking #4252. Since 1996, the popularity has increased by 109.1%. In 2007, approximately 1 in every 83,585 girls born was named Sian. FALLING Recent data shows the name is currently falling.