Eagan sits next to 4 phonetic neighbors — Egan, Eagan, and Keegan are the closest matches by sound. Most share Eagan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little fire, born of fire"
"watchful, alert"
"son of the servant of John"
"visionary, seer"
"of high quality, excellent"
"from Erroll, Scotland"
"three-leafed symbol of fortune"
"handsome son"
"river"
"wise protector, counselor-guardian"
"dark warrior, dark brown champion"
"son of Uaid (Walter)"
"possession, acquisition"
"one who follows at the heel"
"little seal"
"well-born (through Owen/Eugenius)"
"strength, honor"
"brother, brotherly"
"descendant of Nuallán"
Similar sound: These names share phonetic patterns with Eagan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Eagan.
Rhythm: Eagan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.