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Catholicon (Breton dictionary)

1464 · 15th century

The Catholicon is a Breton–French–Latin dictionary compiled in 1464 by Jehan Lagadeuc, a cleric of the diocese of Tréguier, and printed at Tréguier in 1499. It is the first dictionary of the Breton language and one of the earliest dictionaries to include French, and it is a key source for Middle Breton.

Cite this entry
APA
The Epoch Institute. (2026). Catholicon (Breton dictionary). In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/catholicon-breton-dictionary
MLA
“Catholicon (Breton dictionary).” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/catholicon-breton-dictionary. Accessed .
Chicago
The Epoch Institute. “Catholicon (Breton dictionary).” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/catholicon-breton-dictionary.
Harvard
The Epoch Institute (2026) ‘Catholicon (Breton dictionary)’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/catholicon-breton-dictionary (Accessed: ).

Last reviewed October 2026Random entry ↻