Future sits next to 2 phonetic neighbors — Futura and Fyler are the closest matches by sound. Most share Future's Latin via English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"that which is yet to come"
"dwelling near the church"
"ash tree clearing"
"the Lord is salvation"
"bear king"
"house guardian"
"noble, virtuous"
"the river that swallows all rivers (from Zaire/nzadi)"
"spring-like, of the spring"
"resolute protector"
"new house"
"earth, sea"
"variant X-spelling of Zane"
"little king"
"one who is saved, survivor"
"one who raids, bold adventurer"
"shining, brilliant"
"powerful ruler, brave power"
"joyful, jovial (from the same root)"
"white, fair-complexioned"
"son of Ken, son of the bold"
Similar sound: These names share phonetic patterns with Future — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin via English origins, giving them the same cultural heritage as Future.
Rhythm: Future is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.