Sian is a distinctive boys' name in United States, ranking #10168 in 2000 with 6 recorded births. This places Sian in the bottom 16% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2025 with 26 births ranking #4123. In 2000, approximately 1 in every 327,322 boys born was named Sian. RISING Recent data shows the name is currently rising.