Luther sits next to 3 phonetic neighbors — Luca, Luther, and Tucker are the closest matches by sound. Most share Luther's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"famous army, warrior people"
"scholar"
"peninsula, point of land"
"guardian spirit, divine being"
"from the steep place"
"son of Henry"
"little poet, little philosopher"
"related to Thor (thunder)"
"words of a song"
"serpent's mouth"
"who is like God (via Michael)"
"Yahweh has given"
"God has given"
"little rock"
"modern invented name"
"remembered by God"
"to listen, to spy out"
"sea land"
"light, illumination"
"born on Tuesday (Akan day name)"
Similar sound: These names share phonetic patterns with Luther — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Luther.
Rhythm: Luther is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.