Sincere is a distinctive boys' name in United States, ranking #7852 in 1996 with 7 recorded births. This places Sincere in the bottom 25% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2022 with 545 births ranking #544. In 1996, approximately 1 in every 270,605 boys born was named Sincere. STABLE Recent data shows the name is currently stable.