Coast sits next to 3 phonetic neighbors — Ocean, Colt, and Rose are the closest matches by sound. Most share Coast's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"shoreline, where land meets sea"
"of the Claudian family"
"God will add"
"healer"
"crow, raven-haired"
"miracle of God"
"east"
"elf ruler (alternative folk etymology)"
"bright-headed"
"my God is an oath"
"spirited, dashing, energetic"
"born of fire, handsome"
Similar sound: These names share phonetic patterns with Coast — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Coast.
Rhythm: Coast is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.