Majha
The partition split the Punjab Province (British India) into the two states of West Punjab (Punjab, Pakistan) and East Punjab. However, the historic Majha region is arguably still the same as before since the partition does not change the previous history of Punjab, therefore does not change the geography of the Majha region of the historic Punjab region.
Punjabi Muslims
The Indian state of East Punjab was created in 1947, when the Partition of India split the former British province of Punjab between India and Pakistan. The mostly Muslim western part of the province became Pakistan's Punjab province; the mostly Sikh and Hindu eastern part became India's East Punjab state. Many Hindus and Sikhs lived in the west, and many Muslims lived in the east, and the fears of all such minorities were so great that the Partition saw many people displaced and much intercommunal violence.