Sam sits next to 4 phonetic neighbors — Samantha, Samara, and Salem are the closest matches by sound. Most share Sam's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God has heard"
"small wild duck with blue-green plumage"
"God has answered"
"from Wales, land of compatriots"
"Silver, bright, pure"
"child of the moon"
"watchful, alert"
"dry, parched"
"diamond of the sea"
"clearing in the west"
"little hollow in the land"
"gift of God"
"big happiness, great light"
"fairy folk"
"variant of Sheila (blind one, or heavenly)"
"modern invented name"
"inquiry, knowledge (from Greek historia)"
"account; record of events"
"golden dawn, radiant morning"
"island"
"to look against (literally)"
Similar sound: These names share phonetic patterns with Sam — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew (via Samuel) origins, giving them the same cultural heritage as Sam.
Rhythm: Sam is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.