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Dictionary of Medieval Names
from European Sources

Tuathal m. A derivative of Old Irish túath 'tribe, people; tribal territory', Old Breton, Middle Welsh tut 'people, kinsmen'.

The name of a legendary early high king of Ireland, a 5th C king of Dumnonia, a 6th C high king of Ireland, a 6th C Breton saint, and a 9th C king of Leinster.

England
Early Modern English
1565 Tovall StAnthonlin p. 17
France
Latin
833 Tutuual (nom) CartRed V
Ireland
Early Modern English
1591 Tole IORCHAR-II p. xxv, Toole ibid. p. xxii
Scotland
Latin
1055x1059 Tuadal (nom) ESC VII; 1093x1107 Thuadhel (gen) ibid. XIV
Cite as: S.L. Uckelman. "Tuathal". In S.L. Uckelman, ed. The Dictionary of Medieval Names from European Sources, Edition 2020, no. 1. http://dmnes.org/2020/1/name/Tuathal.