I have a non-English name that has two common spellings depending on what part of the world it is used in (it is spelled differently in Portugal for example vs South America). I am getting seriously fed up of people I encounter through work misspelling it. Let's say for argument's sake that it's Ana - I consistently get back Anna. I write "Dear X, bla bla bla, Kind regards Ana" and I get back "Dear Anna". I don't mind so much if it is people I haven't had contact with before (though I still think how difficult is it to check the name of the person who has just emailed you) but when it is colleagues I have worked with for 4+ years I just think it is so rude! I point it out and it still happens.
I know it's really petty. AIBU?