Kather sits next to 4 phonetic neighbors — Heather, Katherine, and Kather are the closest matches by sound. Most share Kather's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pure"
"contemplation, beholding"
"noble hill; Ella hill"
"beloved, darling"
"divine, goddess"
"deep, profound"
"bright, shining light"
"ewe; gentle one"
"flowering; bright blossom"
"gift from God"
"defender of mankind"
"free man"
"blessed"
"of the elder tree"
"dark, rich"
Similar sound: These names share phonetic patterns with Kather — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek via Germanic origins, giving them the same cultural heritage as Kather.
Rhythm: Kather is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.