Diamond is a moderately popular girls' name in United States, ranking #495 in 2009 with 617 recorded births. The name reached its all-time peak in 1999 with 2,160 births ranking #150. Since 1996, the popularity has decreased by 63.6%. In 2009, approximately 1 in every 2,977 girls born was named Diamond. FALLING Recent data shows the name is currently falling.