Diarmaid Ó Súilleabháin may refer to:
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Diarmaid O' Súilleabháin (bishop) (1924–1994), Roman Catholic
Bishop of Kerry
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Diarmaid Ó Súilleabháin (writer) (1932–1985), Irish language writer
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Diarmuid Ó Suilleabháin, Irish sean nós singer from County Cork
{{hndis, O Suilleabhain, Diarmaid