Maharani Chand Kaur (1802 – 11 June 1842) was briefly regent of the Sikh Empire. She was the wife of Maharaja Kharak Singh and mother of Nau Nihal Singh, her only son.
She had made an enemy of Dhian Singh, who replaced her servants, who killed her on 11 June 1842 by smashing her head in with wooden pikes
https://en.wikipedia.org/wiki/Chand_Kaur
Maharaja Kharak Singh (22 February 1801 – 5 November 1840), was a Sikh ruler of the Punjab and the Sikh Empire. He was the eldest son of Maharaja Ranjit Singh and Maharani Datar Kaur. He succeeded his father in June 1839
https://en.wikipedia.org/wiki/Kharak_...
Nau Nihal Singh
https://en.wikipedia.org/wiki/Nau_Nih...
Maharani Mehtab Kaur (1782 – 1813) was the first wife of Maharaja Ranjit Singh,
https://en.wikipedia.org/wiki/Mehtab_...
The encyclopedia of Sikhism : over 1000 entries
By H. S. Singha · 2000
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