Riddick sits next to 3 phonetic neighbors — Rick, Derrick, and Hendrick are the closest matches by sound. Most share Riddick's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"powerful ruler"
"new house, new home"
"sharp, intelligent"
"sun, throne"
"God is beautiful"
"glorious gift"
"dweller by the dark meadow"
"of the Jordan River"
"Yahweh is exalted"
"security token"
"aunt"
"spear, metalsmith"
"powerful (by association with the watt unit)"
"beloved, dear one"
"divine, godlike"
"large gun, powerful force"
"forward-moving, avant-garde"
"son, born of"
"Western cowboy hat, frontier spirit"
"red-haired"
Similar sound: These names share phonetic patterns with Riddick — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Riddick.
Rhythm: Riddick is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.