Orion sits next to 3 phonetic neighbors — Ryan, Orrin, and Oriole are the closest matches by sound. Most share Orion's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"rising in the sky, boundary"
"raven hill"
"master of inspired frenzy"
"winding valley"
"from the south village"
"strength, dominance"
"lying flat (large book)"
"noble, illustrious"
"gift of God"
"brave in battle"
"possibly from a- (not) + treo (tremble)"
"always powerful"
"son of Madoc"
"hawk of the plain"
"gentle, loyal one"
"bear strength, brave as a bear"
"wealthy"
"one who transports goods by cart"
"lives near reeds"
"Frankish person"
Similar sound: These names share phonetic patterns with Orion — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Orion.
Rhythm: Orion is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.