Sundarī Nandā, also known simply a Sundarī, was the half-sister of Siddhartha Gautama, who later became Gautama Buddha. She became a nun after the enlightenment of her half-brother and became the foremost bhikkhuni in the practise of jhana (total meditative absorption). She lived during the 6th century BCE in what is now Bihar and Uttar Pradesh in India.