Harrison sits next to 4 phonetic neighbors — Harris, Harry, and Henderson are the closest matches by sound. Most share Harrison's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"descendant of the ruler of the home"
"little blessed one"
"rock, strong one"
"red earth, ground"
"grey home"
"independent thinker, nonconformist"
"Italian form of John, gift of God"
"bowman, one who shoots arrows"
"son of the valiant one"
"from the hollow"
"lake colony, settlement by the pool"
"salvation of God, the Lord saves"
"father of peace"
"patrician, of noble birth"
"from Attica, man of Athens"
"may God protect"
"God's spear"
"protector of people"
"one who glorifies God"
"God will raise up"
Similar sound: These names share phonetic patterns with Harrison — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old German origins, giving them the same cultural heritage as Harrison.
Rhythm: Harrison is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.