Reilly sits next to 4 phonetic neighbors — Riley, Rylee, and Wiley are the closest matches by sound. Most share Reilly's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"courageous, valiant"
"smooth, tender"
"poet, bard"
"charcoal merchant, coal worker"
"one who heals"
"modern American creation, variant of Jayden"
"from the hill by the lake"
"variant of Tyson, firebrand"
"God is good"
"servant of a noble, warrior retainer"
"gray valley, son of the gray one"
"son of Dick, son of Richard"
"church"
"horseman, cavalryman"
"dark, dark-featured"
"wise one (from Sionann mythology)"
"from the Lennox region of Scotland"
"little slender one"
Similar sound: These names share phonetic patterns with Reilly — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Reilly.
Rhythm: Reilly is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.