Deniz sits next to 4 phonetic neighbors — Denis, Dennis, and Denys are the closest matches by sound. Most share Deniz's Turkish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"sea, ocean"
"eagle, swift and free"
"worshipper of the Compassionate"
"worshipper of Allah"
"beneficent, one who does good"
"goal, aspiration"
"victorious, joyful"
"desire, wish, longing"
"brave hero, valiant warrior"
"angelic protector, bringer of mercy"
"one who has power and ability"
"generosity, nobility, virtue"
"scholar, learned one, knowledgeable"
Similar sound: These names share phonetic patterns with Deniz — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Turkish origins, giving them the same cultural heritage as Deniz.
Rhythm: Deniz is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.