My pet peeve is the Finnish name “Yrjö”. It comes from the Greek name “Geôrgios”, which means farmer, but nowadays the word “yrjö” means vomit. ‘Unique spellings’ like some “Everleigh” also drive me crazy.
Any name that’s a “unique” spelling of an ordinary name.
Names that are just adjectives in English, usually “uniquely” spelled too.