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.
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"courageous, valiant"
"poet, bard"
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"defender of men"
"God saves, salvation (Hebrew Hoshea)"
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"from the Lennox region of Scotland"
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"slender, powerful in battle"
"dark, dark-featured"
"smooth, tender"
"fruitful hill"
"knight, mounted warrior"
"hill"
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"nickname for Charles"
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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.