Why is the Earth called earth?

WHO NAMED EARTH?!??!

The original name of earth (or of land) was pangaea. this was cause millions of years ago all the lands were one. Pangaea means "all-earth" or "mother-earth"
Earth is the name of dirt and stone as well, the name of the ground in general. we walk on earth, and so earth became the name of our planet.

I have no f*cking idea.;--;