[Ger-Poland-Volhynia] Pronunciation of TSCHERNJACHOW

[Edith McKelvy]

Good Morning!  I'm still looking for my elusive paternal grandfather,
FRIEDRICH REMPEL/RIMPEL/RIMPLE.
 
New clues  (a priceless oral interview on CD with a cousin who has since
passed away)  point to a town near Zhitomir named TSCHERNJACHOW.  
 
How would the name Tschernjachow  (now known as Czerniachiw, UK) be
pronounced/spoken?     Cher-nya-chef?   SHER-na-koff?  
 
 Edith Rimple McKelvy
edies_hook at msn.com