Diamond is a moderately popular girls' name in United States, ranking #150 in 1999 with 2,160 recorded births. The name reached its all-time peak in 1999 with 2,160 births ranking #150. Since 1996, the popularity has increased by 27.3%. In 1999, approximately 1 in every 821 girls born was named Diamond. FALLING Recent data shows the name is currently falling.