Valiant sits next to 3 phonetic neighbors — Valentine, Valiant, and Julian are the closest matches by sound. Most share Valiant's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"Brave, courageous, showing great valor"
"not madness, alyssum flower"
"Waterfall or cascade"
"wisdom, knowledge, sound judgment"
"the king"
"small spring, place of the small spring"
"his gift"
"Settlement of Beonna; from Benna village"
"lord of the marches, borderlands nobleman"
"illustrious, shining"
"from the burnt town or settlement"
Similar sound: These names share phonetic patterns with Valiant — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French / Latin origins, giving them the same cultural heritage as Valiant.
Rhythm: Valiant is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.