Mariann is a distinctive girls' name in United States, ranking #3002 in 2000 with 47 recorded births. The name reached its all-time peak in 2000 with 47 births ranking #3002. Since 1996, the popularity has increased by 193.8%. In 2000, approximately 1 in every 38,638 girls born was named Mariann. FALLING Recent data shows the name is currently falling.