Ianto sits next to 3 phonetic neighbors — Ianthe, Yanto, and Ian are the closest matches by sound. Most share Ianto's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"longevity, vital force"
"divine disclosure, uncovering of truth"
"inaccessible, deep; heroic"
"healer (from Jason root)"
"drawn from the water"
"anointed"
"one who listens intently, listener"
"son of William"
"dove, peaceful"
"young, youthful"
"Nectar of immortality"
"clay hill settlement"
"of nobility, from the lineage"
"divine supreme being, cosmic power"
"noble, nobility"
Similar sound: These names share phonetic patterns with Ianto — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Latin via Welsh origins, giving them the same cultural heritage as Ianto.
Rhythm: Ianto is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.