Thelma sits next to 4 phonetic neighbors — Velma, Alma, and Selma are the closest matches by sound. Most share Thelma's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"divine will"
"hazel tree meadow"
"Finnish feminine name, possibly related to air or era"
"little meadow, dear clearing"
"tailor, one who cuts cloth (from Taylor root)"
"untamed, free spirit"
"high tower"
"male deer, hart"
"my God is an oath, pledged to God"
"graceful, charming (implied by components)"
"from brandy, the distilled spirit (Dutch etymology)"
"modern melodic invented name, variant of Kehlani"
"light"
"lyric, of or relating to the lyre, suitable for singing"
"noble, of noble kind"
"harmony, freedom from conflict"
"noble, of the Goths"
"woodland clearing (Locc's meadow)"
"modern invented name"
"extraordinary person remembered in stories"
"victorious one"
Similar sound: These names share phonetic patterns with Thelma — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Thelma.
Rhythm: Thelma is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.