Sincere is a distinctive boys' name in United States, ranking #592 in 2023 with 479 recorded births. The name reached its all-time peak in 2022 with 545 births ranking #544. Since 1996, the popularity has increased by 6,742.9%. In 2023, approximately 1 in every 3,567 boys born was named Sincere. FALLING Recent data shows the name is currently falling.