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Joey Ray was a member of Jim's scavenging team -- who originated from Mar Sara. Using Occam's Razor, it can be deduced that he survived. Note that Jem's Song is in the Joeyray bar jukebox. Very interesting that a stranger named Joeyray from Mar Sara had a song that a Mar Saran named Joeyray knew was endearing to one of his partners...
The name may be a reference to Joeyray Hall, a Blizzard cinematics editor.