Bible Encyclopedias
Berwyn (or Gerwyn)

Cyclopedia of Biblical, Theological and Ecclesiastical Literature

Berwyn (Or Gerwyn)

a Welsh saint, a son of Brychan who is said to have settled in Cornwall, but is difficult to identify, unless he is the same as St. Garonus, a hermit who preceded St. Petrock at Bodmin. Another account (Rees, Welsh Saints, p. 142) makes Gerwyn a son of Brynach by Brychan's daughter.

Bibliography Information
McClintock, John. Strong, James. Entry for 'Berwyn (or Gerwyn)'. Cyclopedia of Biblical, Theological and Ecclesiastical Literature. https://www.studylight.org/​encyclopedias/​eng/​tce/​b/berwyn-or-gerwyn.html. Harper & Brothers. New York. 1870.