Sinjin is a distinctive boys' name in United States, ranking #4957 in 2007 with 19 recorded births. This places Sinjin in the top 34% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1997 with 21 births ranking #3436. In 2007, approximately 1 in every 109,223 boys born was named Sinjin. STABLE Recent data shows the name is currently stable.