Iolo is a distinctive boys' name in England & Wales, ranking #3256 in 2025 with 6 recorded births. The name reached its all-time peak in 2012 with 31 births ranking #947. Since 1996, the popularity has decreased by 14.3%. In 2025, approximately 1 in every 45,323 boys born was named Iolo. RISING Recent data shows the name is currently rising.