Apolo sits next to 3 phonetic neighbors — Apollo, Pablo, and Polo are the closest matches by sound. Most share Apolo's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"destroyer"
"God is salvation"
"from the ash tree valley"
"short form of Andre/Andrew"
"bright friend, fair valley"
"page boy (de Chiel)"
"people of the riverside forest"
"coal settlement; dark farmstead"
"warrior's settlement, warrior's town"
"royal, kingly"
"YHWH is God"
"son of Hutch (Hugh)"
"one who bakes (occupational surname)"
"divine light"
"white heart, blessed heart"
"modern coinage; visually distinctive invented name"
"peace, repose"
"of Nazareth, the Nazarene"
"the very greatest (superlative of Magnus)"
"rope maker"
"dweller by the lake"
Similar sound: These names share phonetic patterns with Apolo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Apolo.
Rhythm: Apolo is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.