Rajah Sulayman, sometimes referred to as Sulayman III (Sanskrit: स्ललैअह्, Arabic: سليمان, Abecedario: Suláimán) (1558–1575), was the Rajah of Maynila, a fortified Tagalog Muslim polity on the southern half of the Pasig River delta, when a Spanish expedition arrived in the early 1570s. Sulayman – along with his co-ruler Rajah Matanda of Maynila and Lakan Dula, who ruled the neighboring polity of Tondo – was one of the three reigning monarchs during the Spanish conquest of the Port of Manila and the Pasig River delta. Spanish accounts describe him as the most aggressive of the three rulers – a characteristic chalked up to his youth relative to the other two rulers. He was the rajah in the Pasig River Delta era. His adoptive son, baptised Agustin de Legaspi upon conversion to Christianity, was proclaimed the paramount ruler of Tondo upon the death of Lakan Dula, but he along with most of Lakan Dula's sons and most of Sulayman's adoptive sons were executed by the Spanish after being implicated in the 1587–1588 Tondo Conspiracy. This action helped the Spanish Empire to further solidify its grip on Luzon and most of the Philippine archipelago. Names Spanish documents note that Sulayman's subjects called him Raja Mura or Raja Muda, "Young Raja", a reference to the fact that he was Raja Matanda's nephew and heir apparent. The Spaniards also called him "Raja Solimano el Mow" so his name is also often spelled as Solimán due to Spanish influence. Ancestry According to the genealogy proposed by Mariano A. Henson in 1955, and asserted by Majul in 1973, Sulayman was the 14th Raja of Manila since it was founded as a Muslim principality in 1258 by Rajah Ahmad when he defeated the Majapahit suzerain, Raja Avirjirkaya. Spanish conquest of Manila (1570–1571) Rajah Sulayman was the ruler of Maynila along with Rajah Matanda when the invasion of Legazpi occurred. Manila was already influenced by neighboring Southeast Asian kingdoms. The area was already an entrepot of trade from China, Siam and other places. The Spanish explorer Miguel López de Legazpi, searching for a suitable place to establish his capital after moving from Cebu to Panay due to Portuguese claim of the archipelago, sent Martín de Goiti and Juan de Salcedo on an expedition northwards to Luzon upon hearing of a prosperous kingdom there. Goiti anchored at Cavite and established his authority by sending a "message of friendship" to