Mokona is Mokona. You count them one Mokona, two Mokona and then you stop because there's only two.

When you eat dirt for the first time and leave your family to build a shack in the woods

Mokona Modoki is the name given to the two rabbit-like creatures from CLAMP's sister series Tsubasa: Reservoir Chronicle and xxxHolic (Also appearing in one of their earlier works, Magic Knight Rayearth). The name Mokona Modoki (or simply Mokona) refers to any or both characters, as they are never called by their real names. The Black Mokona’s real name is Larg, while the White Mokona’s real name is Soel. However, the Mokonas always refer to themselves in the third person.
Their principal feature is thier behaviour, which is always hyper.