I know it's Turkish, but this is a really ugly name! Just think of all the cruel jokes that Can come out of other kids' mouths, say, "kick the Can". I pity whoever has this name.
It is pronounced 'JAN/JUN' as in Turkey they pronounce their C's as J's. I've met people with this name so I know this is how is pronounced. The solution if you had this name and were in an English school you could change the 'c' to a 'j' so there'll be no confusion.