Riggins sits next to 4 phonetic neighbors — Rigby, Rigby, and Higgins are the closest matches by sound. Most share Riggins's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of the ridge dweller"
"elm grove"
"bald, little bald one"
"one who carves, wood-carver"
"God is salvation"
"my rock is God"
"little rock"
"the Persian"
"descendant of the fair one"
"deer people (from Devon)"
"from Scotland, Scotsman"
"free man, strong man"
"modern spelling of Coe (jackdaw bird)"
"belonging to the country, widely known"
"one who illuminates, enlightener"
"brotherly, genuine"
"swift projectile, arrow"
"hound of the plain"
"cherished, beloved"
"of noble origin"
"little fire (from Irish aodh)"
Similar sound: These names share phonetic patterns with Riggins — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Riggins.
Rhythm: Riggins is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.