Heaven sits next to 3 phonetic neighbors — Haven, Kevin, and Evan are the closest matches by sound. Most share Heaven's Old English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"the sky, abode of God"
"abundant, prosperous growth"
"son of Henne (Henry)"
"volcanic black glass"
"settlement by the woodland grove"
"grandchild, descendant"
"old friend, wise friend"
"God has heard"
"God is my strength"
"modern American invented name"
"modern invention with Arabic suffix influence"
"God has helped"
"victory of the people"
"supplanter"
"treetop, eloquent speaker"
"strength, virtue, honor"
"anointed one who carries"
"dark one, dark water"
"person of no importance (archaic)"
"from the fortress"
"modern blend of Jay and Gavin elements"
Similar sound: These names share phonetic patterns with Heaven — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Heaven.
Rhythm: Heaven is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.