Supervisor keeps miss pronouncing my name

I started at a new company about a month ago. The first day, my supervisor mispronounced my name and I politely corrected him. My name is foreign so I’m used to people mispronouncing it so I even wrote it phonetically so it’d be easier to learn. He thanked me for correcting him and we moved on. However he continues to mispronounce it or he calls me by random nicknames instead. He doesn’t do this to anyone else in the office though so it’s a bit weird. No one has a problem pronouncing it correctly except him. Idk how to bring this up to him again as I’m still new and trying to find my footing. Am I just being to nitpicky? Any advice?

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