Cajun is a distinctive boys' name in United States, ranking #8794 in 2003 with 7 recorded births. The name reached its all-time peak in 2003 with 7 births ranking #8794. Since 1996, the popularity has increased by 40.0%. In 2003, approximately 1 in every 282,181 boys born was named Cajun. FALLING Recent data shows the name is currently falling.