Girvan Yuddha Bikram Shah
Girvan Yuddha Bikram Shah  (19 October 1797 – 20 November 1816), also called Girvanyuddha Bikrama Shah, was fourth King of Nepal from 1799 to 1816.
Although he was not the legitimate heir to the throne his father made him the heir for being the son of his favourite wife Kantavati Devi.
He was the son of King Rana Bahadur Shah, and ascended the throne at the age of 1 and 1/2 years when his father abdicated to become an ascetic.
He ruled under the regency of Queen Lalit Tripura Sundari and Prime Minister Bhimsen Thapa.
He died at age 19 and was succeeded by his young son Rajendra Bikram Shah.
Trailokya, Crown Prince of Nepal
General Crown Prince Trailokya Bir Bikram Shah Deva (November 30, 1847 – March 30, 1878) was, as the eldest son of King Surendra of Nepal, the heir apparent to the throne of Nepal.
He died before his father, and his son Prithvi ascended the throne.
Kantavati Devi
Kantavati Devi( Kantawati Devi Jha)(? – 31 October 1799) was the favourite wife of Rana Bahadur Shah, King of Kingdom of Nepal.
She was the mother of Girvan Yuddha Bikram Shah.
She died of smallpox.
Chautariya Pushkar Shah
Chautariya Pushkar Shah( August 16, 1784 – 1841) was the prime minister( Mukhtiyar) of Nepal from August 1838 to early 1839.
He previously served as the Governor of Doti from 1831 to 1837, and as Special Ambassador to China from 1837 to 1838.
He was the counselor of state from 1840 to 1843.
Pushkar Shah had four sons: Sri Chautaria
Bhim Bikram Shah, Rana Bikram Shah, Colonel Sri Chautaria Bir Bikram Shah, and Colonel Ambar Bikram Shah.
Subarna Prabha Devi
Subarna Prabha Devi( 1779 –?) was the Queen Regent of Girvan Yuddha Bikram Shah and second wife of King Rana Bahadur Shah of Nepal.
She was the mother of eldest Prince Ranodyat Bikram Shah, Prince Samarsher Shah and a princess.
She was daughter of Subudhi Khadka Basnyat.
Rana Bahadur Shah
Rana Bahadur Shah, King of Nepal  (1775–1806) was the King of Nepal from 1777 to 1806.
In 1777, he succeeded to the throne after the death of his father, King Pratap Singh Shah.
He ruled under the regencies of his mother, Queen Rajendra Rajya Lakshmi Devi (died on 13 July 1785 from tuberculosis), and then of his uncle, Bahadur Shah.
During this time, the kingdom expanded by conquest to include the Garhwal and Kumaon regions, now part of India.
He sent his uncle Bahadur Shah to jail, who later died in jail.
Dhirendra of Nepal
Dhirendra Bir Bikram Shah Deva of Nepal( 14 Jan 1950 – 1 June 2001) was the youngest son of King Mahendra of Nepal, and his first wife, Crown Princess Indra.
Gorakshya Rajya Lakshmi Devi
Gorakshya Rajya Lakshmi Devi( 1798–16 December 1816) was the Queen of Girvan Yuddha Bikram Shah, King of Nepal.
She was the mother of Rajendra Bikram Shah.
She died of smallpox.
Indra, Crown Princess of Nepal
Indra Rajya Lakshmi Devi Shah (25 July 1926 – 4 September 1950) was the consort and Crown Princess of Mahendra Bir Bikram Shah, then Crown Prince of Nepal.
She was the mother of Kings Birendra Bir Bikram Shah and Gyanendra Bir Bikram Shah, Prince Dhirendra Bir Bikram Shah, and Princesses Shanti Rajya Lakshmi Devi, Sharada Rajya Lakshmi Devi and Shobha Rajya Lakshmi Devi.
Queen Kanti of Nepal
Kanti Rajya Lakshmi Devi Shah (5 July 1906 – 12 April 1973) was the Queen consort and first wife of Tribhuvan Bir Bikram Shah, King of Nepal.
She was the mother of King Mahendra Bir Bikram Shah.

Question: Who is the paternal grandfather of Girvan Yuddha Bikram Shah?
Answer: Pratap Singh Shah