Pop culture homages, references and Personal World Easter Eggs...

Some time ago a post asking about small, silly references to favorite books, movies or any other media that you had incorporated into your own world.

I replied with the coffee like drink Klava which originated in the Vlad Taltos books by Steven Brust (I think, I could be wrong but that's where I got it from...)

Recently prepping for a game I needed some "barbarian muscle" and decided on three brothers...named...

Sven

Ole

...and...

Thorsen

What are some homages, nods, tips of the cap and Easter Eggs that you have included in your worlds?