Eamonn is an Irish name, derived from the Gaelic 'Eimhin', which means 'universal'. It was originally used as a byname for a warrior, implying strength and courage. The name gained popularity during the 19th century among the Irish diaspora and has since been used in other English-speaking countries.
"The name Eamonn saw an uptick in popularity between 1997 and 2006, with a total of eleven babies given this name over the decade."