Percival sits next to 3 phonetic neighbors — Percy, Perseus, and Parsifal are the closest matches by sound. Most share Percival's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pierce the valley"
"court musician, entertainer"
"pebbly place, bald clearing"
"supplanter, one who replaces another"
"lawful, proper"
"one touched by good fortune"
"hollow, empty"
"payment, redemption (word association)"
"a day's travel, expedition"
"the greatest"
"raven's island"
"occupational surname for cellar manager"
"one who serves"
"fiery, ardent"
"follower of Calvin (in Protestant tradition)"
"beloved youngest son"
"linden tree hill"
"crown, wreath"
"crooked hill"
Similar sound: These names share phonetic patterns with Percival — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French origins, giving them the same cultural heritage as Percival.
Rhythm: Percival is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.