Ross sits next to 3 phonetic neighbors — Russ, Rawson, and Rhys are the closest matches by sound. Most share Ross's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"headland, promontory"
"Caesar, imperial leader"
"alder tree"
"slender, narrow"
"free man, warrior"
"oracle, mouth of the serpent"
"defender of the army"
"great, venerable"
"hound of the plain"
"Hawaiian form of Matthew"
"one who pursues"
"bent river or stream"
"variant of Lakin: small play, sport"
"linden tree, lime tree"
"beloved (from David)"
"little seal"
"wealthy gift"
"village of the cross, farm by the cross"
"victory of the people"
"ravager, one who destroys"
Similar sound: These names share phonetic patterns with Ross — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic origins, giving them the same cultural heritage as Ross.
Rhythm: Ross is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.