Zadkiel sits next to 4 phonetic neighbors — Ezekiel, Zakiel, and Gabriel are the closest matches by sound. Most share Zadkiel's Hebrew-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is my justice"
"powerful ruler's son"
"son of the right hand"
"son of Hugh, spirit"
"unity, excellence, number one"
"divinely chosen"
"sky god, shining deity"
"forest friend, house friend"
"nobleman, earl"
"son of Colin"
"my light"
"greeting of peace (used as hello and goodbye)"
"flat-topped hill settlement"
"man of law, lawyer"
"garden, orchard of God"
"victory, honor"
"surname used as first name"
"church, one who lives by a church"
"peaceful ruler"
Similar sound: These names share phonetic patterns with Zadkiel — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Zadkiel.
Rhythm: Zadkiel is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.