Sylus sits next to 4 phonetic neighbors — Silas, Cyrus, and Sylas are the closest matches by sound. Most share Sylus's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"man of the forest"
"gift of splendor, bounty"
"Wine's hill, friend's hill"
"rock (from city of Tyre)"
"rider, horseman, mounted warrior"
"cheerful, jovial"
"son of Piers (Peter)"
"laughter of God"
"heart, mind, spirit (from Hugh)"
"large homestead, settlement (via Trevor)"
"son of Jan (John)"
"with melody, melodious"
"wine's town, friend's settlement"
"letter Z sound"
"land of Eoghan (Owen)"
"Olympic victor"
"hard metal alloy of iron and carbon"
"mythical griffin creature"
"independent one, unbranded steer, nonconformist"
"servant, attendant"
"fiery one"
Similar sound: These names share phonetic patterns with Sylus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Sylus.
Rhythm: Sylus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.