Singh /ˈsɪŋ/ is a title, middle name or surname, which originated in India. Derived from the Sanskrit word for lion, it was adopted as a title by certain warrior castes in India. It was later adopted by several castes and communities, including the Sikhs, whose Guru Gobind Singh mandated it for all the baptized males. As a surname or a middle name, it is now found throughout the Indian subcontinent and among the Indian diaspora, cutting across communities and religious groups.