Ocean sits next to 4 phonetic neighbors — Oceane, Austin, and Tristan are the closest matches by sound. Most share Ocean's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"great surrounding sea"
"brave in battle"
"Thor's stone"
"of the Caspian Sea"
"from Rome, the Eternal City"
"dove (short for Callum from Scottish Gaelic)"
"renowned warrior"
"charcoal, dark"
"my God is Yahweh"
"raven"
"God has established (via Jachai root)"
"spear rule"
"from the city of Dax"
"dark man's settlement, coal-black farm"
"descendant of Madan (little dog)"
"dark-complexioned"
"God has remembered"
"dragon"
"abundant, bountiful"
"rocky land, stony ground"
Similar sound: These names share phonetic patterns with Ocean — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek (Okeanos) origins, giving them the same cultural heritage as Ocean.
Rhythm: Ocean is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.