William Nyallau Badak (22 July 1951 – 20 January 2025) was a Malaysian politician and judge who served as the Member of Parliament (MP) for Lubok Antu from March 2008 to May 2018.
[2] Before entering Parliament, he was a Native Court judge.
[3] He joined PSB in 2019 after he was sacked from PRS on 22 April 2018 and dropped as a candidate in the 2018 general election.
On 8 November 2022, he left PSB and pledged his support for GPS.
[4] On 20 January 2025, William Nyallau died from heart complications at the Sarawak Heart Centre, Kota Samarahan, Sarawak, Malaysia at the age of 73.