'Tunkul' is not a word in English language, it is gibberish.
Malaysia does not have presidents, but Prime ministers. The names of the prime ministers of Malaysia (according to chronological order) are: Tunkul Abdul Rahman Tun Abdul Razak Tun Hussein Onn Tun Dr. Mahatir bin Mohamad Dato' Seri Abdullah Badawi Current Prime Minister (2009): Najib tun Razak Note that these may not be their full names.