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"
"God is salvation"
"holy, sacred place"
"tournament fighter"
"fifth"
"God knows"
"land, territory"
"the Lord remembers"
"bridge worker or keeper"
"chief friend, noble friend"
"people's power"
"maker of cases or boxes"
"fair administration of law"
"supplanter's son"
"son of the marsh dwellers"
"the brown one"
"meditation, absorption"
"city of the moon"
"slender, narrow"
"swiftness, fleetness"
"crew, group of companions"
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.