Seidy is a distinctive girls' name in United States, ranking #10746 in 2015 with 10 recorded births. The name reached its all-time peak in 2013 with 19 births ranking #6683. Since 1996, the popularity has increased by 66.7%. In 2015, approximately 1 in every 178,465 girls born was named Seidy. RISING Recent data shows the name is currently rising.