Where does “half” come from?

half (Dutch) comes from Middle Dutch half, from Old Dutch half, from Proto-Germanic *halb, from Proto-Germanic halbaz, from Proto-Indo-European (s)kelH-, from Proto-Indo-European (s)kel- — to bend, crook; bent, crooked; leg, heel, knee,...

half (Dutch): half; half before the next whole; the middle of...