Máedóc of Ferns, Irish bishop and saint (b. 550)
Saint Máedóc of Ferns (/ˈmai.ðoːɡ/; fl. 6th & 7th century), also known as Saint Aidan (Irish: Áedan; Welsh: Aeddan; Latin: Aidanus and Edanus), or Saint Mogue (Irish: Mo Aodh Óg), was an Irish saint who was the first Bishop of Ferns in County Wexford and the founder of thirty churches.

His birth name was Áed, the name of the Irish god of the underworld, meaning "fire". The name Aidan is a diminutive form of Aed or Aodh, and was also a form of the Latin name Dominus. Máedóc and Mogue are other pet forms of Aed or Aodh, formed from the Irish affectionate prefix mo- and the diminutive suffix -óg, meaning "young", making for something like "my dear little Aodh". In some Welsh sources, he is known by the more colloquial epithets Aeddan Foeddog or Foeddawg.