In 1450, a Johore -born Arab adventurer, Sayyid Abubakar bin Abirin, came to Sulu and lived with Rajah Baguinda Ali in Buansa.
[3] Abubakar bin Abirin bore the titles Sayyid (alternatively spelled Saiyid, Sayyed, Seyyed, Sayed, Seyed, Syed, Seyd) and walShareef an honorific that denotes he was an accepted descendant of the Islamic prophet Muhammad through both the Imams Hassan and Hussain.
His name is also alternatively spelled Sayyid walShareef Abu Bakr ibn Abirin AlHashmi.
[4] Rajah Baginda Ali had no male heir, but had a daughter called Dayang-dayang Paramisuli.
(Dayang-dayang is an Austronesian honorific for "Lady", and precedes a woman's name to denote that she is of high rank and noble standing/noble blood.