Deirdre is a distinctive girls' name in United States, ranking #4124 in 2009 with 37 recorded births. The name reached its all-time peak in 1996 with 109 births ranking #1493. Since 1996, the popularity has decreased by 66.1%. In 2009, approximately 1 in every 49,645 girls born was named Deirdre. FALLING Recent data shows the name is currently falling.