Syon sits next to 4 phonetic neighbors — Zion, Siyon, and Leon are the closest matches by sound. Most share Syon's Hebrew-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the Promised Land, holy city"
"to care for, to cherish"
"to guard, to protect"
"gift of God"
"Yahweh has given"
"measured flow, regular beat"
"to flow down; to descend"
"horse keeper, stable master"
"handsome, beautiful"
"supplanter"
"son of the dark one (via Maurus)"
"earth (via Gaia connection)"
"from Tracy, a Norman place"
"fort at Luguvalium"
"noble, princely"
"short form of Walter"
"son of Hans"
"fit, shapely, graceful"
"he shall descend"
Similar sound: These names share phonetic patterns with Syon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Syon.
Rhythm: Syon is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.