Creating multiple accounts under one email address

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I'd like to play Minecraft with my 8-year old son on the LAN, but doing so requires a different account. I don't mind paying for another account, but adding another one seems to require a different email address, and I'd like to use the same email address. How can I add another account with the same email address?

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How to create multiple email addresses from one gmail account

Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

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