Indira Gandhi
Indira Priyadarshini Gandhi (née Nehru; 19 November 1917 – 31 October 1984) was an Indian politician and a central figure of the Indian National Congress.
She was the first and, to date, the only female Prime Minister of India.
Indira Gandhi was the daughter of Jawaharlal Nehru, the first prime minister of India.
She served as Prime Minister from January 1966 to March 1977 and again from January 1980 until her assassination in October 1984, making her the second longest-serving Indian Prime Minister, after her father.
Gandhi served as her father's personal assistant and hostess during his tenure as Prime Minister between 1947 and 1964.
She was elected President of the Indian National Congress in 1959.
Upon her father's death in 1964 she was appointed as a member of the Rajya Sabha (upper house) and became a member of Lal Bahadur Shastri's cabinet as Minister of Information and Broadcasting.
In the Congress Party's parliamentary leadership election held in early 1966 (upon the death of Shastri), she defeated her rival Morarji Desai to become leader, and thus succeeded Shastri as Prime Minister of India.
As Prime Minister, Gandhi was known for her political intransigency and unprecedented centralisation of power.
She went to war with Pakistan in support of the independence movement and war of independence in East Pakistan, which resulted in an Indian victory and the creation of Bangladesh, as well as increasing India's influence to the point where it became the regional hegemon of South Asia.
Citing separatist tendencies and in response to a call for revolution, Gandhi instituted a state of emergency from 1975 to 1977 where basic civil liberties were suspended and the press was censored.
Widespread atrocities were carried out during the emergency.
In 1980, she returned to power after free and fair elections.
After Gandhi ordered military action in the Golden Temple in Operation Blue Star, she was assassinated by her own bodyguards and Sikh nationalists on 31 October 1984.
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Katherine Frank
Katherine Frank is a noted American author and biographer, now living in England.
Her works include a highly acclaimed biography of Lucie, Lady Duff- Gordon, and the more controversial book" Indira: The Life of Indira Nehru Gandhi," a biography of Indira Gandhi.
She has also written" A Voyager Out: The Life of Mary Kingsley Emily Bronte: A Chainless Soul" and" Crusoe: Daniel Defoe, Robert Knox and the Creation of a Myth".
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He was the grandfather of singer/ poet Leonard Cohen.
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Jawaharlal Nehru
Pandit Jawaharlal Nehru (14 November 1889 – 27 May 1964) was an Indian independence activist, and subsequently, the first Prime Minister of India and a central figure in Indian politics before and after independence.
He emerged as an eminent leader of the Indian independence movement and served India as Prime Minister from its establishment as an independent nation in 1947 until his death in 1964.
He has been described by the Amar Chitra Katha as the architect of India.
He was also known as Pandit Nehru due to his roots with the Kashmiri Pandit community while Indian children knew him as "Chacha Nehru" (Hindi, lit., "Uncle Nehru").
The son of Motilal Nehru, a prominent lawyer and nationalist statesman and Swaroop Rani, Nehru was a graduate of Trinity College, Cambridge and the Inner Temple, where he trained to be a barrister.
Upon his return to India, he enrolled at the Allahabad High Court and took an interest in national politics, which eventually replaced his legal practice.
A committed nationalist since his teenage years, he became a rising figure in Indian politics during the upheavals of the 1910s.
He became the prominent leader of the left-wing factions of the Indian National Congress during the 1920s, and eventually of the entire Congress, with the tacit approval of his mentor, Gandhi.
As Congress President in 1929, Nehru called for complete independence from the British Raj and instigated the Congress's decisive shift towards the left.
Nehru and the Congress dominated Indian politics during the 1930s as the country moved towards independence.
His idea of a secular nation-state was seemingly validated when the Congress swept the 1937 provincial elections and formed the government in several provinces; on the other hand, the separatist Muslim League fared much poorer.
But these achievements were severely compromised in the aftermath of the Quit India Movement in 1942, which saw the British effectively crush the Congress as a political organisation.
Nehru, who had reluctantly heeded Gandhi's call for immediate independence, for he had desired to support the Allied war effort during World War II, came out of a lengthy prison term to a much altered political landscape.
The Muslim League under his old Congress colleague and now opponent, Muhammad Ali Jinnah, had come to dominate Muslim politics in India.
Negotiations between Congress and Muslim League for power sharing failed and gave way to the independence and bloody partition of India in 1947.
Nehru was elected by the Congress to assume office as independent India's first Prime Minister, although the question of leadership had been settled as far back as 1941, when Gandhi acknowledged Nehru as his political heir and successor.
As Prime Minister, he set out to realise his vision of India.
The Constitution of India was enacted in 1950, after which he embarked on an ambitious program of economic, social and political reforms.
Chiefly, he oversaw India's transition from a colony to a republic, while nurturing a plural, multi-party system.
In foreign policy, he took a leading role in the Non-Aligned Movement while projecting India as a regional hegemon in South Asia.
Under Nehru's leadership, the Congress emerged as a catch-all party, dominating national and state-level politics and winning consecutive elections in 1951, 1957, and 1962.
He remained popular with the people of India in spite of political troubles in his final years and failure of leadership during the 1962 Sino-Indian War.
In India, his birthday is celebrated as "Bal DiwasChildren's Day)".
P. N. Dhar
Prithvi Nath Dhar( P.N. Dhar, 1 March 1919 – 19 July 2012) was an economist and the head of Indira Gandhi's secretariat and one of her closest advisers.
Vidya Charan Shukla
Vidya Charan Shukla (2 August 1929 – 11 June 2013) was a noted Indian politician and Minister from the Indian National Congress party.
His political career spanned almost six decades.
He was a close associate of Indira Gandhi.

Question: Who is Indira Gandhi's paternal grandfather?
Answer: Motilal Nehru