Any way to get NAME with popup for newsletter signup?

I would like to create a popup to encourage visitors to subscribe to my newsletter. On my current newsletter signup page, I request First Name, Last Name, and Email. That way, when I send out a newsletter, I can personalize it (Dear "First Name"). I am told there is no way to request names with popups- is that correct? If so, any other suggestions for this? Thanks!

If the site supports Code Injection, we can use some code to build new popup with Form Block. What do you think, you can share site url, I will try some code

Thanks! Site is www.PetrackPhotography.com