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"
"son of Carr, from the marsh"
"youthful goddess, keeper of immortality"
"meadow, open ground"
"counsel + lake"
"little one (diminutive suffix)"
"sea distance, nautical mile"
"born on Christmas Day, birthday of the Lord"
"pretty, beautiful"
"nobility, aristocracy"
"one who lives near the castle outer wall"
"delicate, languishing"
"faithful, loyal, genuine"
"lily flower"
"ruler's meadow"
"rain, precipitation"
"ash tree pool"
"torch, radiant light"
"foreign woman, stranger"
"falling tone, resolution"
"royal one, of royal blood"
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.