Sylis sits next to 4 phonetic neighbors — Silas, Cyrus, and Solis are the closest matches by sound. Most share Sylis's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the forest (via Silvanus root)"
"sincere, genuine"
"homeland person"
"hollow stalk, tube"
"God strengthens"
"neighbor, dweller"
"from the fortress"
"man, husband"
"steward, estate manager"
"of the Marco family"
"tough, strong, resilient"
"from the British settlement"
"gate keeper"
"air, breath of life"
"born of light"
"joyful, bright"
"peaceful territory, land of peace"
"short nose"
"from the Savoy region (French place name)"
"herder of sheep, shepherd"
"power of the sea"
Similar sound: These names share phonetic patterns with Sylis — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin 'silva' origins, giving them the same cultural heritage as Sylis.
Rhythm: Sylis is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.