Which was the wallet address used to create the Aragon Govern DAO?

The wallet address that has created the Aragon Govern can be read directly on the blockchain using the DAO Govern Executor Address (you can find it in the Settings of your Aragon Govern DAO):

• Go into your Govern DAO: Settings - DAO Govern Executor Address - copy the address.

If your DAO is on Rinkeby go here and paste the copied address in the search bar.

If you DAO is on Ethereum go here and paste the copied address in the search bar.

Go to the transactions section list on the Etherscan page. Here you go to the first and oldest transaction, click on the txn hash. A new page (named Transaction Details) will be opened - the from address is the address of your wallet address.