Something kinda similar, I applied for a PH passport and they ADDED a third name to my name. Instead of my actual "first second last" on my official PH documents I'm " first-second third last". The third isn't anywhere in my name/us birth certificate or any other identifying documents and not at all what my parents named me. I only use my US passport now because it caused a bit of confusion with my US departing airline ticket first name not matching my PH passport and if it had that, then the arrival into the US would not match my US passport.