Caladin sits next to 5 phonetic neighbors — Paladin, Aladdin, and Caelan are the closest matches by sound. Most share Caladin's Modern/Celtic-inspired-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"invented warrior name, holy warrior"
"invented, unique (no established meaning)"
"the sacred crop"
"hospitality toward strangers"
"immortal, ever-living"
"God is gracious"
"Lord, master"
"volcanic black glass"
"red-haired one"
"woodland clearing"
"counsel wolf"
"empty, hollow"
"new house"
"beloved of God"
"bright, enlightened"
"from the town of Dax"
"son of Jack"
"worshiper of God"
"lasting, persistent"
"Short form of Uilliam, the Irish form of William"
"possibly twin (via Tavish connection)"
Similar sound: These names share phonetic patterns with Caladin — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Modern/Celtic-inspired origins, giving them the same cultural heritage as Caladin.
Rhythm: Caladin is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.