Setting up dummy email for forwarding only? (Outlook/Exchange)

Hello fellow 365 Users!

I'm trying to figure out how to set up an extra email so I can have persons who got married abd common typos go to the correct inbox.

E.g. tinasmith [@] domain.com forwards to tinajohnson [@] domain.com OR

aidansmith [@] domain.com forwards to aidensmith [@] domain.com 

I can't find any way to do this without purchasing extra 365 accounts that don't exist. Do I have to purchase a 365 license for every email that needs to be forwarded? There's got to be some way to not punish people for getting married, right?  With my old host there was no additional cost for setting up dummy emails just for forwarding.

Any advice is appreciated! Thank you!