Echo sits next to 3 phonetic neighbors — Eco, Eko, and Juno are the closest matches by sound. Most share Echo's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"reflected sound"
"lake (from -lynn element)"
"hardest substance, precious gemstone"
"star of the sea"
"courageous one from the meadow"
"combination of grace and devotion"
"wind, gust"
"new and graceful"
"ten (from French dix)"
"gentle, beautiful"
"beautiful Mary"
"divine counsel"
"famous rose"
"pearl"
"amber gemstone"
"a history, a recounting (archaic)"
"peaceful one"
"lily flower"
"lion strength, brave as a lion"
"from the king's wood"
Similar sound: These names share phonetic patterns with Echo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Echo.
Rhythm: Echo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.