Tuff sits next to 3 phonetic neighbors — Tuff, Duff, and Buff are the closest matches by sound. Most share Tuff's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"tough, strong, resilient"
"modern American name"
"strong, great warrior"
"smith, metalworker"
"from the market town"
"one who cuts cloth or stone"
"manly, warrior (from Andre component)"
"one who defies authority, resister"
"lordly, master (via Cyril)"
"land of oaks"
"hollow"
"steward, estate manager"
"American variant of Dante"
"from the fortress"
"from the hollow farm"
"truly brave, genuinely bold"
"made of earth, red earth"
"crowned one"
"divine smith"
"renowned, famous"
"queen of the gods"
Similar sound: These names share phonetic patterns with Tuff — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Tuff.
Rhythm: Tuff is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.