Zo sits next to 4 phonetic neighbors — Zoe, Jo, and Beau are the closest matches by sound. Most share Zo's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"life"
"Precious green stone; jade"
"noble woman; endurance (from Patricia/Patience)"
"date palm tree, grace"
"God is gracious (via Shawn/Sean/John)"
"beauty, joyfulness"
"To sparkle or shine; from Greek amaryssein (to sparkle). Used as a ..."
"Variant of Wanda meaning wanderer, combined with African place-name..."
"Prophetess; shining upon men"
"ewe, female sheep"
Similar sound: These names share phonetic patterns with Zo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Zo.
Rhythm: Zo is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.