Susan sits next to 3 phonetic neighbors — Suzanne, Susanna, and Sybil are the closest matches by sound. Most share Susan's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lily"
"God is gracious"
"home ruler, estate ruler"
"air, song, melody"
"she who entangles men"
"land of the black soil"
"wise, knowledgeable"
"son of Ellis, descendant of Elias"
"dweller near the holly trees"
"ruler of the land"
"moon, moonlike"
"divine, god-like"
"gift of the goddess"
"God is my joy"
"follower of Christ"
"noble, of noble birth"
"a falling, descent"
"grace, beloved"
"hare's meadow, hare's clearing"
"equity, lawfulness"
"noble father's daughter"
Similar sound: These names share phonetic patterns with Susan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Susan.
Rhythm: Susan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.