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"
"ruler of the home"
"bright fame"
"great king"
"little king; descendant of the king"
"Little fire; born of fire"
"breath, vapor, impermanence"
"son of the sea"
"friend, darling"
"defender of men"
"fortunate, good"
"From the Old Norse 'kartr' meaning cart; an occupational surname us..."
"brave, lion-hearted"
"famous warrior, renowned in battle"
"wealthy guardian"
"handsome young man"
"motion, wandering"
"noble, strong"
"fair-haired hero; white warrior"
"loyal as a dog"
"messenger of God"
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.