Yaqob I (; c. 1590 – 10 March 1607), throne name Malak Sagad II (Ge'ez: መለክ ሰገድ), was Emperor of Ethiopia from 1597 to 1607, and a member of the Solomonic dynasty. He was the eldest surviving son of Sarsa Dengel. According to E. A. Wallis Budge, Yaqob's mother was Empress Maryam Sena; others sources suggest she was Emebet Harego of the Beta Israel. Because Yaqob had at least three sons before his death, it is likely he was born no later than 1590. Most Ethiopian sources including Tekle Tsadik Mekuria however state that his mother was Harego, but that Empress Maryam Sena championed his right to the throne as she only bore Emperor Sarsa Dengel daughters, and hoped to dominate a long term regency for the boy monarch. Life Sarsa Dengel had intended to make his nephew Za Dengel his successor, but under the influence of his wife Maryam Sena and a number of his sons-in-law, he instead chose Yaqob, who was seven when he came to the throne, with Ras Antenatewos of Begemder as his regent. Za Dengel and the other rival for the throne – Susenyos, the son of Abeto Fasilides – were exiled, but Za Dengel escaped to the mountains around Lake Tana, while Susenyos found refuge in the south amongst the Oromo. When Yaqob came to adulthood six years later, he quarrelled with Ras Antenatewos, and had him replaced with Ras Za Sellase. However, Za Sellase deposed Yaqob, exiling him to Ennarea, and made his cousin Za Dengel Emperor. When Za Dengel proved more troublesome than Yaqob, Za Sellase recalled Yaqob from exile. Not long after Za Dengel was defeated and killed in battle, Susenyos marched north at the head of an army raised amongst the Oromo, and sent a message to Ras Antenatewos proclaiming himself as emperor and demanding support from Antenatewos. Unable to communicate with Za Sellase, the Ras sent his troops to support Susenyos. A similar message to Za Sellase only served to steel Za Sellase into action: he marched on Susenyos, who, sick from fever, retreated into the mountains of Amhara. This lack of resolve convinced Ras Antenatewos to waver in his support, and as the rainy season passed Za Sellase began to negotiate his submission to Susenyos. At this moment Yaqob revealed himself in Dembiya and both Ras Antenatewos and Za Sellase flocked to his side. Susenyos managed to first