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Books about Gwennol:
Gwennol Yn Y Tir by E. G. Jenkins (1976)
Buhez Sant Gwennol, Abad. La Vie de Saint Gwennol, Abb: Myst Re Breton En Une Journ E Et Six Actes (Paperback)... by By (author) Buhez Sant Gwennol (2010)
Gwennol gyntaf y Gwanwyn. Song ... Geiriau gan Hiraethog. [Staff and tonic sol-fa notation.] by William Heber Evans (1960)
Wiki information Gwennol:
Gwennole Le Menn was a Breton writer, editor and lexicographer. He edited various Old and Middle Breton works. Le Menn edited the Catholicon, a trilingual Breton-French-Latin dictionary of 1499, and he compiled a bibliography of Breton literature...
Gwennolé Le Borgne is a sound editor.