Only matching 8 words makes it seem like a lost cause though, since in that case the extended word list would have to be huge. I will ask his other family, maybe somebody helped him set this up and he forgot to add their name. Otherwise let me know if there are other words lists I can try.
Go to this word list and check if all those 32 words has a match in the list; old word list:
archive.orgIf matched, it's an old "
Blockchain.info" wallet 'walletid and password' recovery phrase which can be restored here:
login.blockchain.com/wallet/recover-walletHowever, you'll also need to have access to the email address associated with the account for login authentication and recovery purposes.