Sinclaire is a distinctive girls' name in United States, ranking #19655 in 2006 with 5 recorded births. The name reached its all-time peak in 1998 with 16 births ranking #6332. Since 1996, the popularity has decreased by 28.6%. In 2006, approximately 1 in every 380,214 girls born was named Sinclaire. RISING Recent data shows the name is currently rising.