Rigby sits next to 3 phonetic neighbors — Rigbie, Rugby, and Rigley are the closest matches by sound. Most share Rigby's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"farm on the ridge"
"one who makes verses"
"from the province of Daron"
"instrument of God"
"descendant of Bladen"
"falcon, bird of prey"
"one who wields prosperity"
"son of the red-haired one"
"the hay town"
"who is like God"
"God is gracious"
"bearer of the Aegis (goatskin shield)"
"blessed"
"son of Roger, famous spear"
"rocky hill town"
"the greatest one, supreme ruler"
"diminutive of Hobart"
"friend, ally"
"one who makes wheels"
"spear ruler"
"title of honor (from Titus)"
Similar sound: These names share phonetic patterns with Rigby — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse/English origins, giving them the same cultural heritage as Rigby.
Rhythm: Rigby is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.