Theda is a distinctive girls' name in United States, ranking #18869 in 2015 with 5 recorded births. The name reached its all-time peak in 2013 with 7 births ranking #14470. Since 1996, the popularity has decreased by 16.7%. In 2015, approximately 1 in every 356,931 girls born was named Theda. FALLING Recent data shows the name is currently falling.