Tatadim () also known as Tantawedem, was a king of the Zagwe dynasty. According to Taddesse Tamrat, he was a son of Mara Takla Haymanot. His throne name was Solomon.

Reign Tatadim's name appears in second place in the long lists of the Zagwe kings.G.W.B. Huntingford, "'The Wealth of Kings' and the End of the Zāguē Dynasty", Bulletin of the School of Oriental and African Studies, 28 (1965), p. 10 Taddesse Tamrat states that he was the oldest known son of Mara Takla Haymanot.Taddesse Tamrat, Church and State in Ethiopia, (Oxford: Clarendon Press, 1972), p. 56n.

According to the Gadla Yemrehana Krestos, Tatadim made efforts to secure the succession of kingship for his sons, taking actions against his brothers Jan Seyum and Germa Seyum. The Agaw law of inheritance dictated that his brothers should be his successors, a problem that plagued the Zagwe kings.Taddesse Tamrat, p. 61.

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