Which is the correct/official name of this author?

[dely]

There is an author that has been added as:

Per J. Andersson and Per J Andersson

I checked a couple of OPACs and he is written in both ways so I don't know which one is the correct one in order to edit the wrong name and combine books.

[Elizabeth (Alaska)]

Combined. GR policy is to have a period after the initial.

[dely]

Elizabeth (Alaska) wrote: "Combined. GR policy is to have a period after the initial."

Thank you!