In the world, Muiredach (Muiredach 
) is a very rare masculine given name. The forename Muiredach is habitual in Northern Europe, particularly Ireland, where it is a rare boy's name.
| muiredach tirech Irish king, IE (b. 350) |
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| muiredach mac ruadrach King of Leinster (b. 701) |
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| muiredach mac brain 770-818 (b. 701) |
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muiredach of killala Bishop of Killala, IE |
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| muiredach mac ainbcellaig King of the Cenél Loairn, and of Dál Riata |
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| muiredach mac brain Irish king |
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| muiredach muinderg Irish king |
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| muiredach bolgrach High King of Ireland, IE |
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| muiredach ua hénlainge Irish bishop |
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| muiredach mac murchado King of Leinster |
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| muiredach mac eochada King of Ulster |
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| muiredach muillethan Irish king |
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| muiredach mac eógain King of Ailech, IE |
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| muiredach mac domnaill midi Irish king |
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| muiredach mac eochocáin King of Ulaid |
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