Thank you for your help Rikard.

I’ve managed to duplicate what you did to add more fonts. I’d just like to point out that there is an error in this page of the documentation that was causing the problem I detailed above:
http://kriesi.at/documentation/enfold/register-additional-google-fonts-for-theme-options/
There is a line break between the { and $fonts in the avia_add_content_font part of the code. Its the second half of the code snippet on that page. I just copied and pasted it, and didn’t notice there was an error. It was only after carefully comparing your code above and the help document that I noticed it.

Also, I wasn’t aware that there is a difference between ‘ and ‘

They look identical on this forum to me, but different when using something like the Courier font within notepad! Another bit of careful comparison was what it took to notice this!

Once again, thanks for your help. This ticket can be closed now.