Tierney is a variant of Tiernan. Tiernan is an Irish name, derived from the Old Gaelic name MacTighearnain, which means 'son of Tierna'. The personal name Tierna itself means 'lord and master'.
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Tierney is a variant of Tiernan. Tiernan is an Irish name, derived from the Old Gaelic name MacTighearnain, which means 'son of Tierna'. The personal name Tierna itself means 'lord and master'.