Harper sits next to 5 phonetic neighbors — Jasper, Parker, and Carter are the closest matches by sound. Most share Harper's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"harp player, one who plays the harp"
"battle, fighter"
"fair, white, blessed"
"pledged, devoted"
"son of Evar; son of the boar"
"calm, tranquility"
"peaceful ruler"
"son of marsh dwellers"
"lead metal, dense and enduring"
"man, husband (archaic)"
"fate, fortune"
"the Persian"
"wise protector from the valley"
"brave"
"raven, crow"
"anointed one"
"son of the bright pledge"
"God is just, justice of God"
"handsome, beautiful"
"little rock"
"anointed one (follower)"
Similar sound: These names share phonetic patterns with Harper — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English hearpere origins, giving them the same cultural heritage as Harper.
Rhythm: Harper is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.