Rajmata (lit. king's mother) is an Indian term used for the mother of the head of a princely family in India.

Vijaya Raje Scindia of Gwalior
Vijaya Raje Scindia of Gwalior

Examples include

Rajmata Scindia of Gwalior was once termed "Narajmata" (angry mother) by the erstwhile chief minister of Madhya Pradesh Dwarka Prasad Mishra, her political opponent.[8]

References