The Punjabis (Punjabi: ; ਪੰਜਾਬੀ ; romanised as Panjābī), are an Indo-Aryan ethnolinguistic group associated with the Punjab region, comprising areas of eastern Pakistan and northwestern India. They generally speak Standard Punjabi or various Punjabi dialects on both sides.
The ethnonym is derived from the term Punjab (Five rivers) in Persian to describe the geographic region of the northwestern part of the Indian subcontinent, where five rivers Beas, Chenab, Jhelum, Ravi, and Sutlej merge into the Indus River, in addition of the now-vanished Ghaggar.
The coalescence of the various tribes, castes and the inhabitants of the Punjab region into a broader common "Punjabi" identity initiated from the onset of the 18th century CE. Historically, the Punjabi people were a heterogeneous group and were subdivided into a number of clans called biradari (literally meaning "brotherhood") or tribes, with each person bound to a clan. With the passage of time, tribal structures became replaced with a more cohesive and holistic society, as community building and group cohesiveness form the new pillars of Punjabi society.
Traditionally, the Punjabi identity is primarily linguistic, geographical and cultural. Its identity is independent of historical origin or religion and refers to those who reside in the Punjab region or associate with its population and those who consider the Punjabi language their mother tongue. Integration and assimilation are important parts of Punjabi culture, since Punjabi identity is not based solely on tribal connections. While Punjabis share a common territory, ethnicity and language, they are likely to be followers of one of several religions, most often Islam, Hinduism, Sikhism or Christianity.
The term "Punjab" came into currency during the reign of Akbar in the late sixteenth century. Though the name Punjab is of Persian origin, its two parts (پنج and آب) are cognates of the Sanskrit words, पञ्च and अप्, of the same meaning. The word pañjāb thus means 'The Land of Five Waters', referring to the rivers Jhelum, Chenab, Ravi, Sutlej, and Beas.