[Ronin4hire]

It's used in a lot of girls names.

I don't think I've ever met a guy with ko at the end of his name.

Japanese use -kun or -chan to address children. (Akirakun, Yurichan etc.)

I guess as a foreigner, learning what the kanji "ko" root meaning is makes me think of a child.. but I suppose it's like English surnames names with "son" (or even Arabic names with "bin" in them).

I don't think of "the son of William" when I hear the name "Joe Williamson" so when a name like Akiko is heard.. I don't think Japanese people think "Child of Autumn".