You need to call the Disneyland Resort at (714) 781-4636 to get help from a Cast Member who can reassign the ticket to the appropriate person or correct a name. This can also be done in person at a Disneyland Resort Main Entrance Ticket Booth.
Accordingly, do the names on Disney tickets matter?
Since you’re arriving after June 15, 2021, when Disneyland Resort theme parks are opened to everyone (and not just California residents), it is not imperative that the name on your theme park tickets matches your ID.