Seidy is a distinctive girls' name in United States, ranking #7661 in 2001 with 14 recorded births. The name reached its all-time peak in 2013 with 19 births ranking #6683. Since 1996, the popularity has increased by 133.3%. In 2001, approximately 1 in every 128,611 girls born was named Seidy. RISING Recent data shows the name is currently rising.