Data Inconsistency

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I have a data set where the entries under the name column are not consistent. For instance where there are multiple instances of names:First name may first and surname second. In the same column surname may come first.A third name may even appear down the list. Find example: oluwafemi adetunji Mathew adebayo oluwafemi Philip adetunji adebayo Mathew Mathew adebola adebayo adetunji femi adetunji Philip oluwafemi.

How do i group the same names together?