Boy Names That End in O

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

O is the 6th most common last letter for baby boys' names in the United Kingdom, with 17 names ending in O in the top 300 for 2025, led by Leo (#4). Of those, Lando is the fastest-growing, now 7.1 times as common as in 2020, while Enzo saw the largest increase in births, with 362 more babies receiving the name than in 2020. Hugo (#47) reached its highest rank on record in 2025.