Tennyson sits next to 4 phonetic neighbors — Henderson, Benson, and Lennox are the closest matches by sound. Most share Tennyson's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Dennis"
"forest, wood, timber"
"bower, canopy of branches"
"long-lived, permanent"
"follower of Christ, Christian"
"slender, narrow"
"descendant of Ógán"
"son of Hudde (Hugh)"
"from the valley"
"forest, woodland"
"realm of the dead"
"beam of light"
"God is my justice"
"new house"
"healer, to heal"
"modern American creation, strong settlement"
"light of God (related to Uriel)"
"lion man"
"God is gracious (via Zane/Zaid roots)"
"goodness, benevolence"
"modern variant of Milan/Milen"
Similar sound: These names share phonetic patterns with Tennyson — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English origins, giving them the same cultural heritage as Tennyson.
Rhythm: Tennyson is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.