Which songwriter with the surname Wolfgang is credited on "Rein Me In"?

The songwriter with the surname Wolfgang credited on “Rein Me In” is Max Wolfgang.

The song’s Wikipedia infobox credits Sam Fender, Olivia Dean and Max Wolfgang as songwriters. Wolfgang is therefore the unique surname match asked for in the question. The credit applies to the song itself, which first appeared as a Fender solo recording before the later duet version with Dean.

The other names are associated with different roles in the recording. Adam Granduciel, Markus Dravs and Joe Atkinson are listed among the producers, rather than as the songwriter whose surname is Wolfgang. That songwriter-versus-producer distinction is an easy place to make a mistake, especially because several contributors appear together in the same compact infobox. The song explores self-sabotage in romantic relationships and uses a jazzy instrumental setting with piano and saxophone, adding context to the collaboration’s musical credits.