Coco sits next to 4 phonetic neighbors — Koko, Moco, and CooCoo are the closest matches by sound. Most share Coco's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"from Colette or Nicole"
"helper, assistant"
"flowing river"
"noble strength"
"from the highest mountain"
"estate of Cynsige's people"
"grace and beloved"
"broad meadow, marshy clearing"
"ruler of men"
"joy, happiness"
"ivy plant, faithfulness"
"fragrant bark"
"state of dreamy meditation"
"Wished for child"
"moonlight (from Ayla)"
"short form of Katarina"
"eternally beautiful, ever-living"
"free spirit (modern connotation)"
"little Juana"
"barberry shrub"
"weary, meadow"
Similar sound: These names share phonetic patterns with Coco — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have French origins, giving them the same cultural heritage as Coco.
Rhythm: Coco is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.