By Yantoultra Ngui and Rozanna Latiff SINGAPORE/KUALA LUMPUR (Reuters) -Malaysia is expected to name Ahmad Zulqarnain Onn, group CEO of the country's largest asset manager Permodalan Nasional Berhad (PNB), as the head of its biggest state pension fund, three people familiar with the matter said. The appointment will fill the role left vacant after Prime Minister Anwar Ibrahim in December named Amir Hamzah Azizan, the previous CEO of the Employees Provident Fund (EPF), as second finance minister in a cabinet reshuffle. Ahmad Zulqarnain's appointment is expected to be announced as early as at the end of January, two of the sources said. In an emailed response to a Reuters' query on Thursday, a spokeswoman at the EPF said the pension fund is "unable to offer any comments at this time on leadership changes."