It can go the other way. My partner has no middle name and recently got a formal letter from the HSE (Irish national health service) addressed to "Sorcha No Nam

It can go the other way. My partner has no middle name and recently got a formal letter from the HSE (Irish national health service) addressed to "Sorcha No Name Ní Shúilleabháin"* *not her actual first and last name to be clear, not doxxing her on HN.