The 1920 census lists New York native Mary Verikios as an alien. She lost her citizenship upon her marriage to unnaturalized Greek immigrant Peter Verikios. I’d forgotten about this until I stumbled upon a reference to A Nationality of Her Own which addresses the citizenship of US women before the 1922 passage of the Cable Act which separated a woman’s citizenship status from that of her husband.
When Mary and Peter married his citizenship status became hers. That’s not true today.