Ruby is a predominantly feminine given name taken from the name of the gemstone ruby.The name of the gemstone comes from the Latin rubinus, meaning red. The ruby is the birthstone for the month of July.. The name first came into wide use for girls in the late Victorian era along with other jewel names.

Constantine (/ ˈ k ɒ n s t ən t aɪ n / or / ˈ k ɒ n s t ən t iː n /; Latin: Cōnstantīnus, Greek: Κωνσταντῖνος, Kōnstantînos) is a masculine and feminine (in French for example) given name and surname which is derived from the Latin name Constantinus, a hypocoristic of the first names Constans and Constantius, both meaning "constant, steadfast" in Latin.