Jeffery sits next to 4 phonetic neighbors — Jeffrey, Geoffrey, and Jefferson are the closest matches by sound. Most share Jeffery's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pledge of peace, divine peace"
"charcoal, dark"
"mill town, settlement by the mill"
"western town, western settlement"
"thatcher, roof builder"
"wish, desire, ideal (Persian variant Arman)"
"rule of the spear, spear ruler"
"little fire, fiery one"
"charming, wily"
"little king"
"small, junior"
"to light up, illuminate"
"Moorish, dark-skinned"
"from the coal settlement"
"tree"
"messenger of God"
"no one equals God"
"emperor, supreme ruler"
"jewel, precious"
"reminiscent of paladin (heroic knight)"
"son of Ky (invented)"
Similar sound: These names share phonetic patterns with Jeffery — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic via Old French origins, giving them the same cultural heritage as Jeffery.
Rhythm: Jeffery is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.