Definition of "nawab"

Colonel Altamont, the Nawaub of Lucknow’s prime favourite, an extraordinary man, who had, it was said, embraced Mahometanism, and undergone a thousand wild and perilous adventures was at present in this country, trying to negotiate with the Begum Clavering, the sale of the Nawaub’s celebrated nose-ring diamond, ‘the light of the Dewan.’

1848 November – 1850 December, William Makepeace Thackeray, chapter 38, in The History of Pendennis. […], volumes (please specify |volume=I or II), London: Bradbury and Evans, […], published 1849–1850

The nawabs of Bhopal, Ranput, Murshidabad, and Dhaka, along with the nizam of Hyderabad, all affirmed that the sultan has misled Muslims with his “erroneous” call to jihad and insisted that Indian Muslims had a duty to support Great Britain.

2015, Eugene Rogan, The Fall of the Ottomans, Penguin, published 2016, page 71