UM
Una MacMahon
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Una MacMahon was a daughter of Teig MacMahon of Corcabaskin in Thomond, and she married the ninth Baron of Kerry and Lixnaw. She was the mother of four barons in succession, three of whom held the title in turn after their brother.
Research notes
✓ DOCUMENTED (Source: Burke's Peerage (modern edn), LANSDOWNE lineage pp.2237-38, re-photographed and read 22 Jul 2026.): UNA, dau. of TEIG MACMAHON, of Corcavasey [Corcabaskin], in Thomond (note-only - the West Clare MacMahon chiefs); 1st wife of the 9th Baron; MOTHER OF THE 14TH BARON (our line) and his three baron brothers. Direct ancestress. Added 22 Jul 2026.