Sincere is a distinctive boys' name in United States, ranking #736 in 2004 with 256 recorded births. The name reached its all-time peak in 2022 with 545 births ranking #544. Since 1996, the popularity has increased by 3,557.1%. In 2004, approximately 1 in every 7,753 boys born was named Sincere. STABLE Recent data shows the name is currently stable.