Mariann is a distinctive girls' name in United States, ranking #9045 in 2010 with 13 recorded births. The name reached its all-time peak in 2000 with 47 births ranking #3002. Since 1996, the popularity has decreased by 18.8%. In 2010, approximately 1 in every 136,717 girls born was named Mariann. FALLING Recent data shows the name is currently falling.