Kelby sits next to 4 phonetic neighbors — Kirby, Kelsey, and Colby are the closest matches by sound. Most share Kelby's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Settlement near the well"
"of God (via -iel suffix)"
"rising, ascending"
"Bird-like, of or relating to birds"
"companion, friend (Old English origin)"
"bold warrior, warrior chief"
"one who carries the treasure"
"one who covers"
"mold, form (original Arabic root)"
"from the southern lands"
"Son of Otto"
"soldier"
"beauty, charm"
"of Mars, warlike"
"high son, chosen son"
"victory of the people (through Nicholas derivation)"
"Stream, flowing"
"God will add, God increases"
"growth and abundance (via Zaid root)"
"God has heard"
Similar sound: These names share phonetic patterns with Kelby — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Kelby.
Rhythm: Kelby is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.