Dartagnan is a distinctive boys' name in United States, ranking #3401 in 2005 with 29 recorded births. The name reached its all-time peak in 1999 with 67 births ranking #1608. Since 1996, the popularity has increased by 141.7%. In 2005, approximately 1 in every 68,867 boys born was named Dartagnan. FALLING Recent data shows the name is currently falling.