transfering a xbox gamertag to new account

I believe that you have an xbox with multiple accounts on it. Minecraft was purchased on that xbox, but with a different account. The reason your able to play it is because the license is on that xbox thus granting your xbox privilege to play it. The only
way you'll be able to play that game on the new xbox is to either buy it or transfer the other gamertag that did buy it to the new xbox. With the transfer of gamertag with the license to the new xbox it will become playable for you, but I do advise to transfer
the other gamertag first and then yours and just go into the settings to make yours the main gamertag.

On my new xbox I've redeemed my old account but I've changed the gamertag, I'm wanting to transfer games ext from my old xbox to the new one but the data is owned by my old gamertag can I still transfer from the old gamertag to my new one ??

On my new xbox I've redeemed my old account but I've changed the gamertag, I'm wanting to transfer games ext from my old xbox to the new one but the data is owned by my old gamertag can I still transfer from the old name to my new one ????

1. There is no way to merge two gamertags.

2. Any Microsoft account can only have one gamertag associated.

3. Migrating a gamertag two a different Microsoft account will take over all digital purchases and subscriptions as they are bounded to the gamertag, not the Microsoft account. Any existing credits will not be transferred as they are bounded to the Microsoft
account.

4. When buying a new Xbox 360 the games being purchased with the migrated gamertag will still be available, but you should also consider to have the licenses transferred to the new 360 then. If course there is no transfer of save games possible.

5. There is a difference in the license models of the 360 and the One. In the 360 digital purchases are bound to the console and the purchasing gamertag. On the One they are primarily bound to the purchasing gamertag. There is no license transferring on
the One.

So in summary, there is unfortunately no way to have both gamertags merged. To migrate gamertag 1 into account 2 you have to get rid of gamertag 2 which means the games purchased by gamertag 2 could get lost if not transferred to the new 360 then, purchases
for the One will be lost anyhow by this. So for the One it would be best to have both accounts installed on the One and have the one set as home console for both accounts, so games purchased by any of the accounts could be played by both of them. For the 360
the licenses of both gamertags should be transferred to the new 360 so both accounts are able to play them.

But no merging of the accounts at all.

only way to transfer a gamertag to a new account is on the xbox 360. instructions can be found here

support-origin.xbox.com/.../switch-gamertag-to-different-microsoft-account in order to do this you need a fresh msa with no gamertag associated and you have to be able to sign into the gamertag you want to transfer on the xbox 360.