Ya'ish was the governor of Sicily for the Fatimid Caliphate in 969–970.
Ya'ish was a freedman (mawla) of al-Hasan ibn Ali al-Kalbi, the first member of the Kalbid dynasty to become governor of Sicily in 948–953.
[2] Ya'ish however proved unable to quell the factional quarrels within his province between different Berber tribes.
As a result, he was replaced in June 970 by Ahmad's brother, Ali.
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