Ruby sits next to 4 phonetic neighbors — Rudy, Reuben, and Rubi are the closest matches by sound. Most share Ruby's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"deep red, the color red"
"noble ruler"
"stranger, guest, foreigner"
"from the fortress"
"royal title for kings children (Iberian)"
"from the Cayman Islands"
"descendant of Bradach (spirited one)"
"modern American invented name"
"he who grasps the heel"
"bright, radiant"
"that which is believed"
"curly-haired"
"craftsman, artisan"
"one who brews or creates"
"village near a winding path"
"creative American name combining Ty + Reese"
"He is my God"
"modern coined name, possibly hillside light"
"strength, virtue, honor"
"dear friend, beloved companion"
"zero, the concept of nothing"
Similar sound: These names share phonetic patterns with Ruby — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin rubinus origins, giving them the same cultural heritage as Ruby.
Rhythm: Ruby is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.