About the McDonagh surname
The surname McDonagh is associated with a patronymic formation. The Mac-/Mc- formation is traditionally patronymic and means “son of” in Gaelic languages. The surname may originally have expressed descent before becoming fixed as a hereditary family name. The prefix in McDonagh belongs to a family of Gaelic forms traditionally used in patronymic surnames and is generally associated with descent.
Pronunciation:
Èm-sé-deou-nag/ɛmsedəʊnaɡ/