There aren't "last names for girls" and "last names for boys." Its just last names. For the first names there are names for different genders, but not for the last names. Some last names are: Zamora, Smith, Turner, Williams
She didn't have one. The ancient Egyptian rulers did not use last names, just titles after their given names to distinguish one from another. Cleopatra had the title "Thea Philopater" after her first name, which meant father loving goddess.