Sincere is a distinctive boys' name in United States, ranking #567 in 2017 with 480 recorded births. The name reached its all-time peak in 2022 with 545 births ranking #544. Since 1996, the popularity has increased by 6,757.1%. In 2017, approximately 1 in every 3,855 boys born was named Sincere. STABLE Recent data shows the name is currently stable.