" 

 : I would say the ""jh"" sound exists in Assamese (ঝ).  But this is from what I imagine I have heard, and leave it to the experts to decide.  I would imagine that জ    	  and য are very similarly pronounced.  The letter   ঞ is called ""niyo"" but pronounced ""iyo"" with slight nasalization.  So ""eeio"" is definitely wrong.   "