Rajah Salalila

Pengiran Seri Laila (c. early 1500s), or Panguilan Salalila in Spanish records, was a pengiran or married member of the Bruneian royal family and was the uncle of Sultan Sayf ul-Rijal of Brunei. By the 1570s, he had much involvement with the Kingdom of Luzon and Brunei's Castilian War. His name is now often found as the surname "Salalila" from Tagalog and Kapampangan regions of Luzon in the Philippines.

Based on perceived similarities between the names, he is sometimes also called Sulaiman I (Abecedario: Súláiman, from Arabic: sulaiman سليمان) in the belief that he shared the name of his supposed grandson, Rajah Sulayman.

Oral traditions cited by Odal-Devora (2000) identify him as a son of the legendary Dayang Kalangitan and Gat Lontok. Genealogical traditions cited by Majul (1973) claim that he converted to Islam from the Tagalog religion as a result of the missionary efforts of the Sultanate of Brunei.

Salalila's rule ended when he died some time in the early 1500s, and he was succeeded by his wife, who was not named in historical accounts. By 1570, his son Ache had succeeded to the position himself, and had come to be known as "Rajah Matanda" (lit. "Old Rajah").