Only the endings, for example the feminine form of Novák becomes Nováková. When moving to a country where there's no distinction, one usually stays by the mascu

Only the endings, for example the feminine form of Novák becomes Nováková. When moving to a country where there's no distinction, one usually stays by the masculine form in the official documents, regardless of gender. For example, an American-born daughter of Polish immigrants inherits and uses Kowalski as her last name, but if she were born in Poland, she would use the form Kowalska (and her son would be called Kowalski, etc.)