I’m an Andrew, but I go by Drew. Never do I go by Andy.
Now with Andy, you also have Randy.
I say that to say this, I’m real glad my name ain’t Randrew.
@merrydevo I see, how do you know they have a personality disorder? If they do is congratulating them really helpful. Some people might have never received the correct help / diagnosis growing up as a child. Maybe a conversation with them would let them know where you are coming from.