Seidy is a distinctive girls' name in United States, ranking #10823 in 2014 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 2014, approximately 1 in every 178,594 girls born was named Seidy. RISING Recent data shows the name is currently rising.