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"
"bright, clear, famous"
"precious green gemstone"
"worthy of praise"
"God is gracious"
"dawn, aurora"
"prince or chieftain's daughter"
"God is gracious"
"boomerang, curved throwing stick"
"pet form of Sarah"
"dedicated to Mars"
"the Lord is God"
"river of the wolf (Arabic origin)"
"white, bright, dawn"
"Cyneburg's field, royal forest clearing"
"my God is an oath, pledged to God"
"pearl"
"judge, arbiter"
"little wren bird"
"gentle horse"
"heather clearing"
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.