There have been multiple cases where multiple people (with no relation to eachother) will have the same skin, although it being completely custom-made. There are instances of this bug and a comment on Reddit with someone else confirming this are linked to the email.
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[Mod] Celesian
Thank you for your report!
We're already tracking this issue at MCPE-48207, so I will resolve and link this ticket as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
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