Explanation:

- Moorcraft: William Moorcroft was a British veterinarian and explorer. He is more famous for his travels in Central Asia and Tibet rather than drawing attention to royal families of India.

- Cunningham: Alexander Cunningham was an archaeologist who served as the first director-general of the Archaeological Survey of India. He showed interest in Indian history and worked extensively in ancient Indian archaeology.

- Thevenot: Jean de Thévenot was a French traveler known for his voyages in the Middle East and India. His focus was more on travel accounts than detailed historical research on Indian royal families.

- Thomas Coryat: An English traveler and writer, known for "Coryat's Crudities", a record of his travels through Europe and Asia. His works don’t concentrate on specific Indian royal histories.

Cunningham is the correct answer.

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