trace their ancestry back to him. Sri Sulalai was a princess of the royal family of the Sultanate of Singora. Rama II of Siam took her as a concubine. In 1946 Prince Bhumibol Adulyadej and Ananda Mahidol, Rama VIII, toured the Tonson Mosque. Malay Muslims In the three southernmost border provinces, the vast majority of the local Muslim population is predominantly Malay, amounting to about 80 percent of the region's population. Thai Malays speak Kelantan-Pattani Malay, which is in a different language from the Malay language. The high number of Malay origin inhabitants in the southern region is due to the historical nature of the area, which contains parts of the Pattani Kingdom, an Islamic Malay kingdom established in the 19th century, but later annexed to Siam since the early Ayutthaya Kingdom. Similarly, there is an ethnic Thai minority in northern Malaysia. Chinese Muslims In the far north, as well as in select central and southern urban areas, there are pockets of Thai Muslims of Hui (ethnic Chinese Muslim) origin. Most Chinese Muslims belong to a group of people called Chin Haw in Thai, although most Chin Haw are not Muslims. Some historians believe that the name Chin Haw can be explained to be a combination of "Chin" (China) and "Ho" (Hui). The Chin Haw thus can be seen as traders and émigrés who carried with them Hui traditions from China. One of the best known Chinese mosques is Ban Ho Mosque in Chiang Mai Province. Muslim groups Ethnic groups including the Rohingya are found in Thailand's refugee camps, rural fishing villages, as well as in many small towns and cities close to the Myanmar border. As well as being home to many Chinese Muslims, Northern Thailand is home to many Burmese and mixed Chinese-Burmese or Pakistani-Burmese peoples. Other Asian Muslim groups Other represented groups include Muslim Chams, originally from Vietnam since 15th century, who can be found between the mutual border and Bangkok as well as the deep south. In the 1700s and 1800s Vietnam and Cambodia-based Chams settled in Bangkok. Other groups include Middle Easterners such as Arabs and South Asians (especially Indians, Pakistanis and Bangladeshis) and Indonesian Muslims, especially Bugis, Javanese and Minangkabau. According to a 1685 account of a Persian diplomat as well as notes of the French traveller Guy Tachard, there was a substantial Persian Shi'i community in Thailand at the time, with ritual ta'zieh