Radhika sits next to 4 phonetic neighbors — Radha, Radhika, and Rathika are the closest matches by sound. Most share Radhika's Indian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"devotee of Krishna, divine love"
"beloved, dearest one"
"unbeatable, invincible"
"sacrifice, worship, sacred fire ritual"
"earth, the great one"
"of the Aryan people"
"spiritual, of the soul"
"desire, wish, aspiration"
"Goddess Lakshmi, divine prosperity"
"absorbed in singing God praise"
"goddess, divine"
"possibly sun goddess or solar deity"
"swift moving river"
"my joy, my song"
"gentle rain, fine mist"
Similar sound: These names share phonetic patterns with Radhika — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Sanskrit origins, giving them the same cultural heritage as Radhika.
Rhythm: Radhika is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.