Sinclaire is a distinctive girls' name in United States, ranking #13313 in 2012 with 8 recorded births. The name reached its all-time peak in 1998 with 16 births ranking #6332. Since 1996, the popularity has increased by 14.3%. In 2012, approximately 1 in every 220,093 girls born was named Sinclaire. RISING Recent data shows the name is currently rising.