Chelsea sits next to 4 phonetic neighbors — Kelsey, Chelsy, and Chelsie are the closest matches by sound. Most share Chelsea's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"chalk wharf, chalk port"
"ship's victory"
"noble, princess"
"crooked mouth"
"dark complexioned, shadowy"
"advisor, counselor"
"from the pasture land"
"elf counsel, elf power"
"lace-like, delicate"
"soft, tender, gentle"
"king's meadow"
"high, exalted"
"hollow land, forested land"
"inheritance, something handed down through generations"
"heaven, the sky"
"strength, power"
"leaping water"
"little Laura"
"of royal status, kingly lineage"
"manly, brave"
"pure"
Similar sound: These names share phonetic patterns with Chelsea — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Chelsea.
Rhythm: Chelsea is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.