What does konohamaru mean in English?

Konoha literally means leaf or leaves (of a tree), which in Naruto is the name of the village which Naruto lives in. Symbolically called konoha gakure no sato in the series (literally means: the village hidden amongst the foliage).

Maru could mean a wide range of things such as "wholeness, perfection, purity, circle, seduction".

I leave the combining of meanings to you, but e.g one set could be the perfection of konoha.

If you are following the series you might have noticed somewhere in the flow of the sotry where the 3rd Hokage explains the somehwat philosophical 'relation' of "fire" and "leaves" (name of the main country and it's shinobi village in the anime), and he insists on it repeating as in a circle. So the idea 'circle of Konoha' also wouldn't feel too far.