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"
"overseer, superintendent"
"strong as a lion"
"greatest"
"wealthy guardian"
"belonging to the Lord, of God"
"may God protect"
"jewel, gem"
"servant of God"
"noble elder"
"from the coal settlement"
"grey hill, army hill"
"great river, wide flowing water"
"jet aircraft, speed"
"victory, triumph"
"defender of the army"
"Norse man, Viking settler"
"immortal, eternal"
"of the Jordan River"
"modern invented name, possibly 'sincere air' or 'great river'"
"wealthy gift"
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.