What does 旧姓 mean?
旧姓 is a Japanese noun meaning “maiden name, former surname” in English. It is written as 旧姓 in kanji, きゅうせい in hiragana, and kyuusei in romaji. This word is part of JLPT N2 vocabulary.
Example sentence
メアリーの旧姓って、何？
What's Mary's maiden name?