Walter sits next to 3 phonetic neighbors — Walt, Walther, and Wilbur are the closest matches by sound. Most share Walter's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"ruler of the army"
"king, ruler, monarch"
"father of peace"
"gift of God"
"people's champion, victorious"
"son of David"
"rowan tree (mountain ash)"
"one who saws wood"
"elm grove"
"wealthy guardian"
"born on Sunday"
"to live, to dwell"
"truth, from Hebrew Emmet meaning truth or faithfulness"
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"wealthy"
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Similar sound: These names share phonetic patterns with Walter — 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 Walter.
Rhythm: Walter is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.