Kellan sits next to 4 phonetic neighbors — Killian, Kellen, and Kelvin are the closest matches by sound. Most share Kellan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"slender, bright-headed"
"known by God"
"flame, fiery one"
"Yahweh has created"
"the twin"
"dweller near the heath"
"son of Neil, son of the champion"
"little church"
"God has remembered, remembered by God"
"faithful, devoted"
"gray-haired one"
"large gun, artillery piece"
"Saint Anne"
"prestige, luxury (cultural association)"
"wood, forest"
"maker of cases or boxes"
"home on the wooded hill"
"God sees, God is my strength"
"little cloak, beloved"
"primordial deity, elder god"
"one who helps"
Similar sound: These names share phonetic patterns with Kellan — 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 Kellan.
Rhythm: Kellan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.