'Unto' in the Bible

The elder unto the elect lady and her children, whom I love in truth; and not I only, but also all they that know the truth;

If any one cometh unto you, and bringeth not this teaching, receive him not into your house, and give him no greeting:

Having many things to write unto you, I would not write them with paper and ink: but I hope to come unto you, and to speak face to face, that your joy may be made full.