Balcha Aba Nefso (Gurage and Oromo: ባልቻ ጻፎ; 1863 – 1936), also known by his title as Dejazmach Balcha, was an accomplished Ethiopian general, who served in both the First and Second Italo-Ethiopian Wars.
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But there are also many Gurage People who use Oromo names because of their geographical assimilation with the Oromo.
The four largest ethnic groups reported in Hadiya were the Hadiya (90.04%), the Kambaata (1.96%), the Gurage (1.53%), and the Amhara (1.32%); all other ethnic groups made up 5.15% of the population.
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The five largest ethnic groups reported in Hadiya were the Hadiya (78.16%), the Silte (10.13%), the Kambaata (2.22%), the Soddo Gurage (1.8%), and the Amhara (1.63%); all other ethnic groups made up 6.06% of the population.
He further suggests that the Great Oromo Migration may have effectively split this putative ethnolinguistic block to the Lake Zway islands, Gurage territory, and Harar.