The Rais reigned in the
Sindh region for a period of 144 years from to 632 A.D. They allegedly had familial ties with other rulers of South Asia including Kashmir, Kabul, Rajasthan and Gujarat. As attested by coinage, the region had previously been under the indirect influence of the
Sasanians, at least from the reign of
Shapur II. The last Sassanian mints discovered from the region are of
Peroz I (r. 459–484); they are inscribed with the name of one "
Ranaditya Satya", who is assumed to be the eponymous local ruler.
Xuanzang visited Sindh during this period and describes the rulers as being
shu-to-lo (
Shudras). Hinduism and Buddhism co-existed in the realm with the Rai's recorded as building a temple dedicated to
Shiva in
Alor. In 484 C.E., as
Peroz I suffered an overwhelming defeat in his
war with the Hephthalites (484 C.E.), the Sassanians were no more a force to reckon with in their frontier territories and new dynasties arose in many of these places. The origin of the Rais is likely to lay in this power vacuum. However, their origins remain unknown.
Historiography Sindh, as a region, had no extant written histories until the late-medieval era and the sole source of knowledge about the dynasty remains
Chachnama, purportedly, a literal Persian translation (c. 13th-century) of an undated Arabic text that is no longer extant. Literary sources do not record Sasanian activity and details of their actions in Sindh, and no epigraphic, archaeological or numismatic evidence for the Rai dynasty exists. The narrative in the
Chachnama about the Rais has since penetrated into the regional historiography in Persian writers like
Tarikh i Sind in the 17th century and
Tuhfatul karaam in the 18th century. However, some scholars view the
Chachnama as an original work that claimed to be a translation only for political expediency and doubt the accuracy of the historical narratives contained within the text. After the
British conquest of Sindh, as the colonial bureaucrats sought to justify their rule by highlighting how the deposed Muslim rulers had long-oppressed the Hindu natives, the
Chachnama was accorded particular importance as it documented the origins of Muslim rule in the subcontinent. It was cited in works authored by colonial bureaucrats, especially the British Gazetteers. The Rai dynasty, being the penultimate non-Muslim polity in the region and forming the backdrop of the rise of Chach in the
Chachnama, received some attention in contemporary scholarship. In modern-day historiography, the dynasty has attracted sparse scholarship except from a few
numismatists. == Rulers ==