Persis (from Greek , in turn ultimately from Old Persian Parsa, and later als known as: Persia, Pars, Fars) was originally a name of a region near the Zagros mountains at Lake Urmia. The country name Persia was derived directly from the Old Persian Parsa. Over time, the area of settlement shifted to the southwest of today Iran (now Fars).

Persatuan Islam (abbreviated PERSIS or Islamic Union) is an Islamic organization in Indonesia founded on 12 September 1923 in Bandung by a group of Muslims who are interested in education and religious activities led by Haji Zamzam and Haji Muhammad Yunus.