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"
"the Lord is salvation"
"speed of God"
"to shout, cry out with joy"
"gracious, dear one"
"resolute protector"
"dark one"
"son of Guy"
"safe haven, shelter, refuge"
"golden, gilded"
"symbol of resilience and mourning"
"Yahweh has saved"
"young wolf"
"prince, ruler"
"father, head of monastery"
"bright, luminous"
"bright fame"
"modern American creation, gentle (from Kevin root)"
"literary name: the ranger Aragorn"
"dweller at the edge of town"
"to be, to exist, present"
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.