All over the world, Fiach (Fiach 
) is a very rare boy's first name. The forename Fiach is characteristic of Northern Europe, particularly Ireland, where it is quite a rare boy's name. Likewise, Fiach is the last name as well as the forename.
| fiach mac aodha ó broin Lord of Ranelagh and leader of the O'Byrne clan, IE (b. 1534) |
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| fiach mac conghail Irish theatre director and politician, IE (b. 1964) |
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| fiach kunz Irish actor, IE |
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| fiach antaw researcher |
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