Susi sits next to 5 phonetic neighbors — Susie, Suzi, and Suzy are the closest matches by sound. Most share Susi's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"lily, rose"
"innocent, unstained"
"pet form of Robert or Roberta"
"combination of Ra and dene (valley)"
"joyful round song"
"lady, mistress of the house"
"bearer of Christ"
"Pure; stream"
"little red one; graceful river"
"elf counsel (via Alfrid)"
"free woman (via Chanel naming tradition)"
"shield-wolf, defender"
"gracious, favored"
"gray fort or enclosure"
"merciful, gentle"
"little joy, dear song"
"Meadow and ewe; modern blend name"
Similar sound: These names share phonetic patterns with Susi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Susi.
Rhythm: Susi is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.