Gretta is a distinctive girls' name in United States, ranking #3620 in 2003 with 39 recorded births. The name reached its all-time peak in 2010 with 70 births ranking #2594. Since 1996, the popularity has increased by 56.0%. In 2003, approximately 1 in every 46,847 girls born was named Gretta. FALLING Recent data shows the name is currently falling.