Kaléb was a 6th-century sovereign of the Aksumite Empire, which occupied territories in modern-day Ethiopia and Eritrea. As the son of Tazena, he ruled during a period of significant military expansion. He is notably remembered for his military campaign in Yemen around 520, where he overcame the Himyarite ruler Yusuf. Following his victory, he established Sumyafa Ashwa as his viceroy. Beyond his political and military achievements, he is recognized as a saint in various Christian traditions.