Iain is a moderately popular boys' name in England & Wales, ranking #331 in 1997 with 73 recorded births. This places Iain in the top 9% of ranked UK boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 1996 with 76 births ranking #319. In 1997, approximately 1 in every 4,307 boys born was named Iain. RISING Recent data shows the name is currently rising.