Shepherd sits next to 4 phonetic neighbors — Shepard, Shep, and Sheperd are the closest matches by sound. Most share Shepherd's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"noble, high"
"priest"
"divine inspiration, fury, frenzy"
"native Hawaiian hardwood tree"
"rye clearing"
"Gift from God"
"victory of the people (from Nicholas)"
"son of Harry (Henry)"
"cheerful settlement"
"to hold fast, to restrain"
"broad meadow"
"my God is Yahweh"
"speckled, freckled"
"protector of mankind"
"advice, counsel"
"God is gracious"
"rowan tree (mountain ash)"
"fair, white, bright"
"God has consoled"
Similar sound: These names share phonetic patterns with Shepherd — similar vowel sounds, consonant clusters, or rhythm.
Rhythm: Shepherd is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.