Counterpart (noun)

1. A person or thing that has the same function or characteristics as another.
2. A person or thing that is the complement or opposite of another.
3. A person or thing that has a similar role, position, or status to another.

Origin:

From middle english countrepaire, from old french contrepaire, from contre- ("against") + paire ("equal"), from latin pār ("equa.l")

Examples:

1. He is the counterpart of the company's CEO.
2. His counterpart in the other company was also attending the meeting.
3. The counterpart of this coin is the other side.
4. The counterpart of this argument is the opposite viewpoint.
5. She is the female counterpart of the famous actor.