Ithan sits next to 5 phonetic neighbors — Ethan, Ithaan, and Aidan are the closest matches by sound. Most share Ithan's Hebrew-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"long-lived, permanent"
"little drop of water"
"wayfarer, wanderer"
"God is gracious, Yahweh is gracious"
"lion of God"
"asked of God, prayed for"
"king's settlement"
"healer"
"valley of the River Kent"
"modern coinage"
"golden chamber, bay window"
"elf ruler"
"peace (folk etymology)"
"God will hear"
"Yahweh is my strength"
"from the forest"
"possessor of good"
"may God protect"
"beautiful mountain"
"priceless, flourishing (via Anthony/Antonius)"
Similar sound: These names share phonetic patterns with Ithan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Ithan.
Rhythm: Ithan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.