'One's' in the Bible

Each one’s holy contribution is his to give; what each one gives to the priest will be his.”

But two men remained in the camp; one's name was Eldad, and the other's name was Medad. And the spirit rested on them. (Now they were among those in the registration, but had not gone to the tabernacle.) So they prophesied in the camp.

Speak unto the children of Israel, and take of them a staff, a staff for each father's house, of all their princes according to the houses of their fathers, twelve staves: thou shalt write each one's name upon his staff.