Keegan sits next to 5 phonetic neighbors — Reagan, Teagan, and Logan are the closest matches by sound. Most share Keegan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Egan, little fire"
"of Dionysos, god of wine"
"little dark one"
"modern coined name, son of Bray"
"descendant of Dorus, Dorian Greek"
"wild goat (ibex)"
"army man, soldier"
"to rejoice, joyful"
"resolute protector's son"
"son of Brice"
"Brandon's woodland clearing"
"Botolph's town, market town"
"old friend, noble friend"
"oak tree meadow"
"bold power, chief ruler"
"from Rome, the Eternal City"
"water, thermal waters (place name)"
"Yahweh is merciful"
"seven; divine completion"
"whole, universal, powerful"
"first, chief"
Similar sound: These names share phonetic patterns with Keegan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic (Mac Aodhagáin) origins, giving them the same cultural heritage as Keegan.
Rhythm: Keegan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.