Flavius Julius Constans (c. 320 – 350), sometimes called Constans I, was Roman emperor from 337 to 350. He held the imperial rank of Caesar from 333, and was the youngest son of Constantine the Great. After his father's death, he was made augustus alongside his brothers in September 337.
Constans II (Greek: Κώνστας, translit. Kōnstas ; 7 November 630 – 15 July 668), nicknamed " the Bearded " ( Latin : Pogonatus ; Greek : ὁ Πωγωνᾶτος ), [b] was the Eastern Roman emperor from 641 to 668.