Kaston sits next to 5 phonetic neighbors — Caston, Gaston, and Boston are the closest matches by sound. Most share Kaston's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from the castle town"
"of noble lineage"
"gift of God"
"far-sighted, young (if from Cyrus)"
"royal court attendant"
"to heal, to cure"
"strong, healthy"
"people's ruler"
"entire, all-encompassing"
"God is gracious"
"who is like God? (rhetorical — no one is)"
"creative American construction"
"gentle, kind-hearted"
"bridge town"
"poet, deep one (via Devon)"
"conquering, victorious"
"to heal, to cure"
"thorn, sharp stone, flint"
"the moon; lunar"
"fortunate, good"
"man from South Munster (southern Ireland)"
Similar sound: These names share phonetic patterns with Kaston — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Kaston.
Rhythm: Kaston is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.