Boy Names That Start With I

Ranked in the United Kingdom in 2025, with birth trends and peak years.

I is the 18th most common first initial for baby boys in the United Kingdom, with eight I names in the top 300 for 2025, led by Isaac (#35). Of those, Ilyas is the fastest-growing, now 2.5 times as common as in 2020. Ibrahim (#74) and Isaiah (#171) reached their highest ranks on record in 2025.