About the Monaghan surname
No precise meaning is imposed on the surname Monaghan when several formations remain possible. The canonical form used here is “Monaghan”; phonetic or spelling differences found in indexes should be checked against the other information in the record. This caution avoids confusing the general history of a word or surname with the history of a particular family.
Pronunciation:
Mo-na-gan/mɔnaɡɑ̃/