Ruby sits next to 5 phonetic neighbors — Rubi, Libby, and Lily 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
"red, ruby-colored"
"bright, shining light"
"ever clearing; eternal meadow"
"stone of the side, healing stone"
"woodland clearing of the wren"
"church, basilica"
"grace, favor"
"ruler of elves, elf counsel"
"night, dark beauty"
"dweller at the hall"
"time of change"
"one who bears palm branches"
"flower named for botanist Pierre Magnol"
"pearl"
"woman from Magdala; high tower"
"graceful, beautiful"
"famous type"
"maiden"
"eternal, immortal"
"island"
"ardor, enthusiasm, fire"
Similar sound: These names share phonetic patterns with Ruby — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French 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.