Joi sits next to 3 phonetic neighbors — Joy, Joe, and Joie are the closest matches by sound. Most share Joi's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"joy, happiness"
"gift, present"
"creative feminine form combining Julia and -issa suffix"
"bright fame"
"sea (if Kai origin)"
"descendant of the king"
"fair champion"
"lake from Scotland"
"foreign riches, wealth from afar"
"god, divine spirit"
"follower of Christ"
"eternal bloom, forever flowering"
"beloved"
"foreign woman (as variant of Barbara)"
"illustrious, shining"
"foresight, practical wisdom"
"home of the gods"
"surname place name"
"beautiful meadow (speculative Celtic-influenced interpretation)"
"gift of God's grace"
Similar sound: These names share phonetic patterns with Joi — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Joi.
Rhythm: Joi is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.