Iyasu (Ge'ez: ኢያሱ) is an Ethiopian name meaning Joshua. It can also mean Yasu (or Yashu), Yesu, or Jesu.
Various Ethiopian Emperors have used the name including:
- Iyasu I of Ethiopia (also known as the Great) (1682 - 1706)
- Iyasu II of Ethiopia (1730 – 1755)
- Iyasu III of Ethiopia (1784 – 1788)
- Iyasu IV of Ethiopia (1830 - 1832)
- Iyasu V of Ethiopia (1913 - 1916) (uncrowned and excommunicated by the Ethiopian Orthodox Tewahedo Church, not referred to publicly as Iyasu V)
Three claimants to the throne also used Iyasu:
Yeshaq Iyasu claimed the title nəgusä nägäst (1685) of Ethiopia, opponent of Iyasu I.
Girma Yohannis Iyasu (1961 - Present) - Iyasuist claimant to the abolished throne of Ethiopia.
Atse Iyasu - was proclaimed nəgusä nägäst (1787 – 1788) of Ethiopia in Tigray and Gojjam by enemies of Ras Ali I of Yejju.