Yup, and all that is discounting the fact that he also does different renders for their reactions to different names. It's even more work since, at least the last time he did this, it's clear he's still learning the best ways to actually program these things. Here's the code for picking Kirin's name since that's the most recent one added as of this post (unless I'm having a massive brain fart and am forgetting someone):
That's 186 lines of code just to handle her different reactions to the possible names. You can see in the "Onii-chan" variations that he tried a super-cumbersome way of programming the different variations at first, then commented it out and put a much better way right below it. In all the previous name picking events, he used the more cumbersome way.
He even has variations based on events you've done with them, like changed dialogue based on if you
got caught with Ayane during the beach event or not. This happens with all the girls when you choose a name for them to call you. Asking Chika to call you Rin is pretty dang different if you do it before or after the beach event, for example.