Formatting client name in letter templates

Is there a way to format the client’s name so that only the first letter is capitalized? Similar to how you would use {{ format(date field, "January 2, 2003") }} but for client’s first/last name (and nickname)?

In our options we have Capitalization set to manual as the other 2 options wouldn’t really work, at least not the way our firm would like.

We have a few returns where the name was entered all in caps (or lower case letters) and it looks unprofessional when printing the letters. I know we can change the way it’s displayed on the info page, but I would like to take the human element out of the equation if possible. One less thing to worry about when we’re in the think of things.

TIA
Rich