Mildred sits next to 3 phonetic neighbors — Millicent, Millie, and Mildrid are the closest matches by sound. Most share Mildred's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gentle strength, mild power"
"supplanter"
"ocean of nectar, divine gift"
"pearl"
"beloved grace"
"garden, vineyard"
"blonde, yellow-haired"
"little Goth, from the Germanic tribe"
"speech, utterance"
"starry, relating to stars"
"from Gilan region, noble"
"to flourish, to thrive"
"fame, renown, honor"
"fair-haired hero"
"belonging to God, divine grace"
"sea breeze, trade wind"
"tempestuous, like a storm"
"noble strength"
"island meadow"
"traveler through the forest"
"from the sky, heavenly"
Similar sound: These names share phonetic patterns with Mildred — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Mildred.
Rhythm: Mildred is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.