Sikhism developed from the spiritual teachings of Guru Nanak (1469–1539), the faith's first guru, and the nine Sikh gurus who succeeded him. It is one of the most recently founded major religious groups and stands at fifth-largest worldwide, with about 25–30 million adherents (known as Sikhs). Sikhism ( / ˈ s ɪ k ɪ z əm/ SIK-iz-əm), also known as Sikhi ( Punjabi: ਸਿੱਖੀ Sikkhī, ⓘ, from ਸਿੱਖ, Sikh, 'disciple / learner') is an Indian religion and philosophy that originated in the Punjab region of India around the end of the 15th century CE.