Jews in India

 In addition to Jewish expatriates^[11] and recent immigrants, there are seven Jewish groups in India.

1. Among the many theories noted by Shalva Weil as to the origin of Malabar Cochin Jews, they claim to have first arrived in India together with the Hebrew King Solomon's merchants. The fair-complexioned component is of European-Jewish descent, both Ashkenazi and Sephardi.^[12][13]
2. Madras Jews: The Spanish and Portuguese Jews, Paradesi Jews and British Jews arrived at Madras during the 16th century. They were diamond businesspeople^[14] and of Sephardi and Ashkenazi heritage. Following expulsion from Iberia in 1492 by the Alhambra Decree, a few families of Sephardic Jews eventually made their way to Madras in the 16th century. They maintained trade connections to Europe, and their language skills were useful. Although the Sephardim mostly spoke Ladino (i.e. Spanish or Judeo-Spanish), in India they learned Tamil and Judeo-Malayalam from the Malabar Jewish.^[15]
3. Nagercoil Jews: The Syrian Jews, Musta'arabi Jews were Arab Jews who arrived at Nagercoil and Kanyakumari District in 52 CE along with the arrival of St. Thomas. Most of them were merchants and had also settled around the town of Thiruvithamcode.^[16] By the turn of the 20th century, most of the families made their way to Cochin and eventually migrated to Israel. In their early days, they maintained trade connections to Europe through the nearby ports of Colachal and Thengaipattinam, and their language skills were useful to the Travancore Kings.^[17] As historians Rev. Daniel Tyerman and George Bennett cited, the reason for the Jews selecting Nagercoil as their settlement was the town's salubrious climate and its significant Christian population.^[18]
4. The Jews of Goa: These were Sephardic Jews from Spain and Portugal who fled to Goa after the commencement of the Inquisition in those countries. The community consisted mainly of Jews who had falsely converted to Christianity but wanted to continue taking advantage of being Portuguese subjects, instead of immigrating to countries where they could practice Judaism op

https://en.wikipedia.org/wiki/History_of_the_Jews_in_India

Oldest surviving royal bloodlines in India

Which are the oldest surviving royal bloodlines in India today? Minimum qualification being that the start date of the first ruler in the dynasty should be before 1200 AD (as per reliable genealogies not fabricated or contested ones)

Why dynasties? Some Brahmin communities have never ruled but have really really ancient bloodlines. Take the Brahmins of Benares, Kanchi, Tirupati. All of them have very very very old family trees. And all of it is recorded, with fairly detailed birth and death dates.

Gopalan was born in 1911 into a conservative Tamil Brahmin family, at Thulasendrapuram in British India.

Does anybody know what Brahman sect Kamala's family was? There was also a hierarchy within the Brahman bloodlines themselves. 

The Brahmans are divided into 10 main territorial divisions, five of which are associated with the north and five with the south. The northern group consists of Sarasvati, Gauda, Kannauj, Maithil, and Utkal Brahmans, and the southern group comprises Maharashtra, Andhra, Dravida, Karnata, and Malabar Brahmans.

The four main sects of Hinduism are Vaishnavism, Shaivism, Shaktism, and Smartism. Hinduism is a polytheistic religion. Brahma, Shiva, and Vishnu form the Trimurti, the holy trinity (three forms) of Hinduism.