Yoan sits next to 3 phonetic neighbors — Johan, Juan, and Yohan are the closest matches by sound. Most share Yoan's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"Nile River"
"dark-haired one"
"lord of the border territories"
"of the night"
"man from Lucania"
"grace of Baal"
"full-grown man"
"one of the Franks (a Germanic tribe)"
"horse keeper, stable master"
"beloved of God"
"great, venerable, majestic"
"river of the wolf, valley river"
"of the earth mother"
"my lamp, my light"
"gift of Yahweh"
"who is like God?"
"desiring peace, resolute peace"
"the three wise men"
"army man, warrior"
"of the Horatii clan"
Similar sound: These names share phonetic patterns with Yoan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Yoan.
Rhythm: Yoan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.