Sincere is a distinctive boys' name in United States, ranking #544 in 2022 with 545 recorded births. The name reached its all-time peak in 2022 with 545 births ranking #544. Since 1996, the popularity has increased by 7,685.7%. In 2022, approximately 1 in every 3,201 boys born was named Sincere. FALLING Recent data shows the name is currently falling.