Firoz Shah Tughlaq was the cousin brother of Muhammad Bin Tughlaq, and became the ruler of Delhi on 23rd march 1351 A.D. He imposed only four taxes sanctioned by Islamic viz., kharaj (land tax), khams (1/5 of the looted property during wars), Jizya (religious tax on the Hindus), and Zakat.
Kalhana (sometimes spelled Kalhan or Kalhan'a) (c. 12th century), a Kashmiri, was the author of Rajatarangini (River of Kings), an account of the history of Kashmir. He wrote the work in Sanskrit between 1148 and 1149.
Who first applied the name India to the region watered by the Sindhu ?