There are limits. If a shortening of a name that's pronounced differently is used as a nickname, as in Bey for Beyond, then it's 100% fine.
If the shortening could conceivably be used as a nickname, as in Am for Amen, it's a reach but passable.
If it couldnt, eg if you're trying to make a np on Ag from Bags, that's wack.
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The Bad Guys
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