tiga batang rokok (three cigarettes)

Just a query: is rokok directly related to Dutch roken, meaning "to smoke"?
If so, I find it interesting that it should be used in Indonesian... May I venture that this word only refers to cigarette or tobacco smoking and that there is another word family that refers to "natural" smokes, such as that of a fire etc.?
[having-for-the-moment-a-bit-of-very-idle-time-on-my-hands-e]

Marianna