|Rare Photos Of Indira Gandhi & Feroze Gandhi|
I found this article. i hope this helps you a bit but no certain proof.
Indira Gandhi, daughter of Jawaharlal Nehru, became prime minister of India in 1966. Mrs. Gandhi was born on November 19, 1917 to Jawaharlal and Kamala Nehru. She was named Indira Priyadarshini Nehru. She fell in love and decided to marry Feroze Khan, a family friend. Feroze Khan’s father, Nawab Khan, was a Muslim, and mother was a Persian Muslim. Jawaharlal Nehru did not approve of the inter-caste marriage for political reasons (see)
. If Indira Nehru were to marry a Muslim she would loose the possibility of becoming the heir to the future Nehru dynasty. At this juncture, according to one story, MahatmaGandhi intervened and adopted Feroze Khan, gave him his last name (family name/caste name) and got the name of Feroz Khan changed to Feroz Gandhi by an affidavit in England. Thus, Feroze Khan became Feroze Gandhi. Though Mahatma belonged to Bania/Gandhi caste (a business tribe) the proposal was acceptable to Nehru for political reasons. Indira Nehru married Feroze (Khan) Gandhi in 1942 and became Indira Gandhi, which helped her politically as daughter of Nehru (the first Prime Minister of the Indian Union) and daughter–in-law of Gandhi (the father of the nation) securing her place in the future Nehru-Gandhi dynasty (based on ). Another story, according to in a personal communication to me, is that Feroz had a Parsi father whose surname was "GHANDI" not "GANDHI". That was made clear by an advertisement in a major English newspaper of Allahabad. It was Mahatma Gandhi who suggested to Nehru that Feroze's surname be spelt as "GANDHI" instead of the original "GHANDI". An RSS columnist wrote that "Ghandi's" mother was a Muslim, and since an offspring takes on the religion of its mother, Feroz ought to be considered a Muslim