Lamour sits next to 3 phonetic neighbors — Lamar, Amour, and Lamour are the closest matches by sound. Most share Lamour's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"The love"
"always powerful"
"from the mountain"
"dear friend, huckleberry (with noble prefix)"
"son of Jesse / son of Jens"
"from the shorn or cleared land"
"Branch; fern or bracken"
"flowering, flourishing"
"the metal iron, element of strength and endurance"
"modern invented name; possibly derived from Toronto place name"
Similar sound: These names share phonetic patterns with Lamour — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have French origins, giving them the same cultural heritage as Lamour.
Rhythm: Lamour is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.