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"
"anointed one"
"elf ruler, ruler of supernatural beings"
"rose garden"
"daughter of the sea"
"quintessence, the truest form of something"
"manifestation of God"
"meadow of the wren"
"keeper of keys"
"Yahweh has shown favor"
"each of the two"
"solemn commitment"
"counsel + lake"
"bailiff, law officer, estate manager"
"beautiful flower"
"night, dark beauty"
"abundance"
"little dark one, dark-complexioned"
"the great sea, vast waters"
"spiritually renewed"
"the Lord is God"
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.