Murphy sits next to 4 phonetic neighbors — Murray, Marlowe, and Mercy are the closest matches by sound. Most share Murphy's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea warrior"
"sea ruler"
"devoted to God"
"battle glory"
"island of wild boars (alternative etymology)"
"noble, kind"
"thorny shrub, bramble"
"little hollow, low-lying meadow"
"eternal, immortal"
"love; beloved"
"free man, strong"
"reddish-brown earth color"
"to wait, to hesitate"
"luck, prosperity"
"devoted to Jove (Jupiter)"
"defender of men (from Alexandra)"
"fortress on the river (possible Celtic root)"
"glowing ember meadow"
"beautiful"
"industrious ruler"
Similar sound: These names share phonetic patterns with Murphy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish origins, giving them the same cultural heritage as Murphy.
Rhythm: Murphy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.