Joy sits next to 4 phonetic neighbors — Joy, Joi, and Coy are the closest matches by sound. Most share Joy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"happiness, delight, rejoicing"
"son of Cionaodh (fire-born)"
"the winter season"
"God is my Lord, God's grace"
"God is gracious"
"little eagle"
"wood, forest"
"oath of God"
"of the sea, maritime"
"wonderful, admirable"
"small bird (wren)"
"little ruler, impulsive one"
"supplanter, one who grasps the heel"
"from the bogs near the Roe river"
"heavenly, from the sky"
"crooked nose"
"poppy flower"
"forest, wood"
"free one"
"One who lives near a brook"
"of the Julian family"
Similar sound: These names share phonetic patterns with Joy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French (joie) via Latin (gaudia) origins, giving them the same cultural heritage as Joy.
Rhythm: Joy is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.