Rennick sits next to 4 phonetic neighbors — Renrick, Fennick, and Derrick are the closest matches by sound. Most share Rennick's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"settlement at the clean/pure place"
"god of war, justice, and single combat"
"son of Paye/Pace (son of Peace)"
"man of law, lawyer"
"visitor, pilgrim"
"eternal, immortal"
"passion, zeal (from root name Rhys)"
"of Jove (Jupiter), sky father"
"of noble birth"
"wine's town, friend's settlement"
"thankful"
"garden of God, orchard"
"dog star"
"my people"
"new house"
"American coinage, origin debated"
"modern invented name combining Jay and -ven"
"round, barrel"
"selected, set apart"
"the kingdom of Ciar, County Kerry"
"God has favored, grace of God"
Similar sound: These names share phonetic patterns with Rennick — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English/Norse place name origins, giving them the same cultural heritage as Rennick.
Rhythm: Rennick is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.