What are some four-letter Nigerian cities?

21 of the 147 Nigerian cities in Icillion have exactly 4 letters, for example Kano, Yola and Awka.

Which four-letter Nigerian cities start with O?

O is the most common first letter here, with 4 names, such as Oleh, Ondo, Orlu and Oron.

Geography · lists

These are the four-letter Nigerian cities in Icillion: 21 names, from “Anka” to “Zuru”.

21 of the 147 Nigerian cities have exactly 4 letters (14%).
Most start with O (4), B (3) and K (3).
Only names of one word are counted, and only their letters: spaces, hyphens and apostrophes are not.

What are some four-letter Nigerian cities?: 21 of the 147 Nigerian cities in Icillion have exactly 4 letters, for example Kano, Yola and Awka.
Which four-letter Nigerian cities start with O?: O is the most common first letter here, with 4 names, such as Oleh, Ondo, Orlu and Oron.

How deep does your knowledge go?

Seven prompts a day, twenty seconds each. Obvious answers float on the tip of the iceberg; rare ones sink all the way to the trench.