Tom sits next to 3 phonetic neighbors — Tim, Tommy, and Thom are the closest matches by sound. Most share Tom's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"twin"
"of the earth, ground"
"dweller by the mills, mill worker"
"God has healed"
"beloved, dear one"
"three (numeric)"
"beam of light (via Ray)"
"tile maker (via Tyler)"
"eternal, immortal"
"rock, mass"
"modern coinage inspired by Owen/Cowan"
"lord, warrior who holds land by military service"
"elm grove"
"invented by Sir Walter Scott, based on Old English Cerdic"
"increase, wisteria"
"enduring, steadfast"
"slender, powerful in battle"
"dark one's town"
"smooth, tender"
Similar sound: These names share phonetic patterns with Tom — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Aramaic origins, giving them the same cultural heritage as Tom.
Rhythm: Tom is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.