Why punjab is presented as “The Punjab”.

Punjab is a Persian word which mean five rivers. Punj= five and aab= water/ river.
The plains between the Indus and Ganges river are called Punjab as they were irrigated naturally by the fiver rivers: Ravi, Chenab, Bias, Sutlej, Jhelum, and Sindh has seen one of the oldest civilizations in the world, The Indus valley civilization along the banks of river Indus (sindh) in present day Pakistan you can still see its ruins which were first discovered in 1922 by a team of British archeologists.
In 1947 the British divided Punjab between Pakistan and India. The Eastern (Indian Punjab) became the land of Sikhs (the religion of Guru Nanak who was born at Nankana (Pakistan) and preached against idol worship of Hindus. Sikhs are a martial race and they made Amritsar (India) as their holy city. Jats are the people (Punjabi) who are known tradititonally to have larger built, taller in height and slightly lower in I. Q. (its a tradition to call them as having lower I.Q, there is no proof of any Punjabi Sikh or Muslim to have I.Q lower than any other ethnic people of Pakistan and India. Large number of Pujabis have also settled in Canada, UK, USA and elsewhere even before 1947. There is tendency among Hindus to make fun of Sikhs while referring to their homeland, the Indian Punjab. There is no truth in these beliefs however. Punjabi is a peace loving people and have been the place for mystiques, hospitality and bravery. During the two world wars, British recruited maximum number of troops from Punjab, Jhelum and Photohar plataeu areas in particular (both in Pakistan).