Siobhan is a distinctive girls' name in United States, ranking #2245 in 2022 with 84 recorded births. The name reached its all-time peak in 1997 with 139 births ranking #1272. Since 1996, the popularity has decreased by 39.1%. In 2022, approximately 1 in every 19,509 girls born was named Siobhan. FALLING Recent data shows the name is currently falling.