Monmouth Family History
Monmouth Surname Meaning
From Monmouth (Monmouths) which is recorded as Munwy Mutha in the 11th century. The place takes its name from the river Monnow.
A Celtic river-name perhaps meaning ‘fast-flowing’ + Old English mūða ‘river mouth estuary’.
Source: The Oxford Dictionary of Family Names in Britain and Ireland, 2016
