Obscure Names that could be shortened to Nicki

My name is Nicki and I work customer service. Every few days someone asks what it's short for, and every now and then a customer just decides to start calling me by a random name they think is my full name (which confuses me every single time because I don't even realize they're talking to me lol).

It's a running joke at this point to give a different 'full name' every time, specifically when they're rude about it lol, but I'm running out of names.

I want obscure names, historical names, nerdy names, normal names that usually aren't shortened to Nicki, etc. gender doesn't matter.

One of my favourites I came up with was Phoenix, cause It's got a 'nicks' sound in it so it counts lol