Joa sits next to 4 phonetic neighbors — Jo, Joe, and João are the closest matches by sound. Most share Joa's Portuguese-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"my Lord, my Master"
"short form of Andre/Andrew"
"God with us, divine presence"
"follower of Dionysus, god of wine"
"noble lineage (adal) and eager (funs)"
"of Julius, belonging to the Julian family"
"supplanter"
"gift of God (Yohanan root)"
"guest, stranger"
"showing clemency, forgiving"
"noble, strong"
"from the new home"
"battle cry"
"God is strength, aided by God"
"gift of God"
"devoted to Demeter, follower of the earth goddess"
"bright star in Aquila"
Similar sound: These names share phonetic patterns with Joa — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Portuguese origins, giving them the same cultural heritage as Joa.
Rhythm: Joa is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.