Denzel sits next to 4 phonetic neighbors — Denzil, Denzell, and Densel are the closest matches by sound. Most share Denzel's Cornish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"high stronghold, fort on the headland"
"from Scotland, a Scotsman"
"resolute protector, strong-willed warrior"
"one who makes wooden tubs and casks"
"maiden, heart"
"treasure, to store (possible Arabic root)"
"powerful spearman"
"possession, acquisition"
"drop, teardrop"
"courageous heart"
"my God is salvation"
"companion, fellow traveler"
"spear ruler"
"ancient, enduring"
"he will see, he will provide"
"land desiccated from water"
"wine and grain"
"dark-skinned, Moorish"
"leek farm village"
"fair administration of law"
"ruler, leader"
Similar sound: These names share phonetic patterns with Denzel — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Cornish origins, giving them the same cultural heritage as Denzel.
Rhythm: Denzel is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.