Reuben sits next to 3 phonetic neighbors — Ruben, Rubin, and Ruby are the closest matches by sound. Most share Reuben's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"behold, a son"
"a narrow road or lane"
"long stone settlement"
"sweetheart, dear one"
"who is like God"
"the ram"
"wise protector"
"dark, dark-haired"
"who is like God (rhetorical — no one)"
"acquired, possessed"
"one who thatches roofs"
"crew, group of companions"
"son of Cole"
"ewe herder"
"God is gracious (via James/Jacob etymology)"
"continuous improvement"
"gift of God, gift of Yahweh"
"wealth, fortune"
"leek farm village"
"peddler, pack-horse driver"
"shield wolf, protector"
Similar sound: These names share phonetic patterns with Reuben — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Reuben.
Rhythm: Reuben is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.