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"
"little stream, flowing water"
"grace, merciful"
"beautiful flower"
"little angel"
"like sunshine, radiant"
"honey bee + youthful (blend with Melissa)"
"heart"
"holy peacemaking, blessed reconciliation"
"lovely, fair"
"ruler of the land"
"pledged to God"
"agreement, concord, fitting together"
"who is like God?"
"God is gracious"
"canopy of leafy boughs"
"God is my father"
"noble elf ruler"
"sweet substance, beloved, precious"
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.