Kelly sits next to 4 phonetic neighbors — Kelley, Kell, and Kellan are the closest matches by sound. Most share Kelly's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright-headed warrior"
"dark, swarthy"
"famous in battle"
"God has remembered"
"cypress tree"
"invented modern American name"
"short form of Kipling or Christopher"
"little bear, bear cub"
"from the Egnatius family name"
"spear, marksman"
"ruler of the world"
"descendant of the black-haired one"
"luminous, shining"
"fox"
"bent river"
"from Radley (red clearing)"
"dear, gracious, beloved"
"thunder ruler"
"fair, white (from Finn)"
"follower of Dionysus, god of wine"
Similar sound: These names share phonetic patterns with Kelly — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Irish origins, giving them the same cultural heritage as Kelly.
Rhythm: Kelly is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.