I can't think of any author putting four names on a book, it seems like way too much. Nobody every wants to say "I'm reading a book by Robin Shea Beren Wildgrube." Drop the middles or at least make them initials.
If I look at just fn and ln, Rowan Voss sounds nice, and I feel like it could vibe with a wide variety of genres. Rowan S. B. Voss works.
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https://www.behindthename.com/pnl/120652