Sandra sits next to 4 phonetic neighbors — Cassandra, Sondra, and Saundra are the closest matches by sound. Most share Sandra's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"defender of men"
"animal horns"
"admirable, hawk-like"
"nobility, aristocracy"
"torch, radiant light"
"dedicated to Mars"
"heart"
"foreign woman, stranger"
"lily of grace"
"compassion, forgiveness, grace"
"sea, ocean"
"dove"
"quintessence, the truest form of something"
"pledged to God, God is my oath"
"famous ruler"
"new beginning"
"child of heaven"
"pearl of the water"
"star of the sea"
"curly-haired, descendant of Caiside"
Similar sound: These names share phonetic patterns with Sandra — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Italian origins, giving them the same cultural heritage as Sandra.
Rhythm: Sandra is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.