Cathirine sits next to 4 phonetic neighbors — Katherine, Catherine, and Kathryn are the closest matches by sound. Most share Cathirine's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pure, clear"
Similar sound: These names share phonetic patterns with Cathirine — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek katharos origins, giving them the same cultural heritage as Cathirine.
Rhythm: Cathirine is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.