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"
"castle, fortress, palace"
"victors garland"
"ruler of peace"
"set apart, destined"
"high place, hill top"
"Jehovah supports"
"old town, settlement"
"raven's island"
"from Chester (place name)"
"estate dweller"
"ruler of supernatural beings"
"rim of a shield"
"tumult, noise"
"God has given, gift of God"
"savior"
"the brave ones, the warriors"
"fleet of ships"
"short form of Nathan/Nathaniel"
"that which is true or real"
"name of God"
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.