Gulbadan Begum was Emperor Humayun’s:

Gulbadan Banu Begum, as she was known, was the daughter of Babur, the first Emperor of the Mughal Empire, the beloved sister of Emperor Humayun, and the esteemed aunt of Emperor Akbar. She is best known as the author of Humayun-Nama, the account of the life of her half-brother, Emperor Humayun which she wrote on the request of her nephew, Emperor Akbar.

She was born in 1523 in Kabul, Afghanistan. At the age of 17, she was married to a Chagatai noble, her cousin, Khizr Khwaja Khan. She spent most of her life in Kabul. On the request of Akber, she came back to India in 1557. She died in 1603.