Kim’s answer to “Hi Kim, I was wondering if you could clarify the truth about Al’s real name. In Sudden Backtrack (a…” > Likes and Comments

Quotes from "For A Few Demons More":
1. "You need a password. Connect to your calling circle as if you're going to contact me, and while connected to a line, think your given name, and then follow it with your password. QED."
2. "A summoning name?" I stammered, figuring it out. "Your password is a summoning name?"

So if Algaliarept is Al's password/summoning name he must have a real/given name?

Not the way I imagined it, no. Rachel needed to use her given name only the first time to set up her summoning name. She's unique among demons in that her summoning name isn't her given.