Hey famousflame,
Thanks for posting in Apple Support Communities. It sounds like you would like to add nicknames for your cards in the Wallet app. While that's not a current option, you can rearrange your cards so that your preferred cards are at the top. Use these steps from Set up Apple Pay in Wallet on iPhone - Apple Support
"Set the default card and rearrange your cards
The first card you add to Wallet becomes your default card for payments. To set a different card as the default, move it to the front of the stack.
- In Wallet, choose your default card.
- Touch and hold the card, then drag it to the front of the stack.
- To reposition another card, touch and hold it, then drag it to a new location."
If you would like to see this as an added feature, you can also send suggestions from Product Feedback - Apple.
Cheers!