Betty sits next to 4 phonetic neighbors — Betsy, Beth, and Bette are the closest matches by sound. Most share Betty's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is my oath"
"beloved, wished-for child"
"Indian dye"
"wished-for child, beloved"
"sun"
"rose + gentle (folk etymology)"
"earth, soil"
"promised by God, given by God"
"sky, heavens"
"falling tone, resolution"
"graceful vine"
"God is my joy"
"dark, black"
"dream, vision"
"youthful, downy-bearded"
"who is like God? (none compares)"
"queen of orchids (named after William Cattley)"
"joyful, merry"
"beautiful, lovely"
"variant of Jackie or Casey"
"maiden, young girl"
Similar sound: These names share phonetic patterns with Betty — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Betty.
Rhythm: Betty is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.