Discussed here. This is a bit but read it all.

English’s weirdness began with its transformation in the mouths of people more at home with vastly different tongues. We’re still talking like them, and in ways we’d never think of. When saying ‘eeny, meeny, miny, moe’, have you ever felt like you were kind of counting? Well, you are – in Celtic numbers, chewed up over time but recognisably descended from the ones rural Britishers used when counting animals and playing games. ‘Hickory, dickory, dock’ – what in the world do those words mean? Well, here’s a clue: hovera, dovera, dick were eight, nine and ten in that same Celtic counting list.