Eamonn sits next to 4 phonetic neighbors — Eamon, Edmund, and Aymon are the closest matches by sound. Most share Eamonn's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"wealthy protector"
"from Laurentum (laurel city)"
"large homestead, settlement"
"Athenian, of Attic culture"
"variant of risen (past tense of rise)"
"possession, acquired"
"variant of Amal, meaning work or action"
"son of Cole (son of Nicholas)"
"counsel + guardian"
"fortunate, prosperous"
"from the east, east settlement"
"form of Eleanor/Helen meaning 'torch'"
"from Colt's farm"
"brilliant of the north"
"God will add, God increases"
"from the town by the sea"
"bright town"
"the Lord is my God"
"to cry out, a wolf's cry"
"one who lays slates, roofer"
"cold well; from the cold water source"
Similar sound: These names share phonetic patterns with Eamonn — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English via Irish origins, giving them the same cultural heritage as Eamonn.
Rhythm: Eamonn is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.