Sincer is a distinctive boys' name in United States, ranking #8800 in 2004 with 8 recorded births. This places Sincer in the bottom 33% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2007 with 15 births ranking #5866. In 2004, approximately 1 in every 248,100 boys born was named Sincer. FALLING Recent data shows the name is currently falling.