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"
"friend, ally"
"worthy of love"
"rejoice"
"dry (referring to the plant's habitat)"
"freckled, speckled"
"God is gracious"
"ewe, grace"
"bright one, light"
"compassion, kindness"
"hope"
"bliss, good fortune, happiness"
"of Mars, dedicated to Mars"
"purity, renewal"
"pledged to God"
"invented name, possibly meaning noble or grace"
"ewe of heaven"
"life (as short form of Ava)"
"brilliance, radiance"
"flower spear, blooming lance"
"lady of grace"
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.