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)"
"God is gracious"
"he is Yah (God)"
"mortal being"
"shield wolf"
"from the fortress"
"wood, lumber, forest"
"man, husband"
"talent, ability"
"powerful, excellent, good feeling"
"healer (via Jason blend)"
"victory of the people (as short form of Nicholas)"
"king"
"to hide"
"lord, nobleman"
"moon, of the moon"
"healthy, wise"
"variant of Caden (battle)"
"barberry tree hill"
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.