Pengiran Anak Siti Saerah (1928 – 4 November 2013), also referred to as Balabab Besar,[1] was the eldest child and daughter of Sultan Ahmad Tajuddin and Kadayang Amas.

[1] Pengiran Anak Siti Saerah was educated at St. George's School on Jalan Tutong; then employed by the Royal Customs and Excise Department as an officer after working as a nurse.

[2] Due to health issues, Siti Saerah died in the Jerudong Park Medical Centre on 4 November 2013, at around 9:41 p.m., at the age of 82.

[2][3] On the following morning, her funeral was held at her residence in Jalan Ong Sum Ping,[4][5] and was laid to rest at the Royal Mausoleum in Bandar Seri Begawan.

[6] In 1949, Pengiran Anak Siti Saerah married Muhammad Ali bin Tamin; they had four children.