Sinclaire is a distinctive girls' name in United States, ranking #11357 in 2009 with 10 recorded births. The name reached its all-time peak in 1998 with 16 births ranking #6332. Since 1996, the popularity has increased by 42.9%. In 2009, approximately 1 in every 183,687 girls born was named Sinclaire. RISING Recent data shows the name is currently rising.