Calyx sits next to 4 phonetic neighbors — Calix, Felix, and Alex are the closest matches by sound. Most share Calyx's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"cup, chalice"
"supplanter, one who follows closely"
"God is gracious (via Zane/John)"
"open lands, clearing"
"bear"
"diminutive of Ronald (ruler counselor)"
"the ringed planet, sixth from the sun"
"the moon; lunar"
"smooth, clear water"
"highland, high ground"
"descendant of Nuallán"
"entire, all-encompassing"
"lake colony, Roman settlement by the pool"
"marshy meadow"
"from, of (noble origin)"
"man of the olive tree"
"lively energy, kicks"
"war, strife"
"open land, cleared field"
"rainbow"
"ridge meadow"
Similar sound: These names share phonetic patterns with Calyx — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Calyx.
Rhythm: Calyx is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.