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"
"from the burnt town or settlement"
"good oak"
"Waterfall or cascade"
"bright, famous, clear"
"lord of the marches, borderlands nobleman"
"Settlement of Beonna; from Benna village"
"noble, of noble kind"
"wisdom, knowledge, sound judgment"
"the king"
"his gift"
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.