Fiach is an Irish male given name. It may refer to:
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Saint Fiacc, fifth-century bishop of Sletty in Ireland
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Fiach McHugh O'Byrne (1534–1597) Irish chief
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Fiach Mac Conghail (born 1964) Irish theatre director and Senator
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Fiach Moriarty, Irish singer-songwriter
See also
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Tomás Ó Fiaich, Irish Catholic primate and cardinal
Similar names
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Fiacha
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Fiachra
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Fiachna
Fiachna or Fiachnae is a name borne by several figures from Irish history and legend, including:
*Fiachnae mac Báetáin, king of the Dál nAraidi in the 7th century
*Fiachnae mac Demmáin, king of the Dál Fiatach in the 7th century
*Fiachan of L ...
{{given name
Irish-language masculine given names
Masculine given names