Sirius sits next to 3 phonetic neighbors — Cyrus, Darius, and Serius are the closest matches by sound. Most share Sirius's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"glowing, scorching"
"place of the torch or fire"
"son of Hugh, spirit"
"elaboration of Ahmad (most praised)"
"from Moray, seafarer's place"
"god of thunder and strength"
"swift, graceful (by association with deer)"
"chamber, enclosed space"
"man of the forest"
"star"
"tile maker (via Tyler)"
"sky god, shining deity"
"possible Japanese aesthetic: figure, image"
"invented by Sir Walter Scott, based on Old English Cerdic"
"beloved of God, beloved of Yahweh"
"prince, king"
"rescuer, redeemer"
"descendant of the fair one"
"hill, marshland"
"brave and hardy"
Similar sound: These names share phonetic patterns with Sirius — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Sirius.
Rhythm: Sirius is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.