Men in Saudi Arabia are generally not called by their given names, but as the father of their oldest son. The same goes for women. So if a couple's oldest son is named Sultan, the father would be called Abu Sultan, and the mother would be called Umm Sultan. If the children are only daughters, then the oldest daughter's name is used, but only until a male child is born, at which time the parents would be known as the father or mother of the male child. To those not familiar with this custom or cultural tradition, it may not seem fair and might appear to slight the female children of the family. Many businesses in Saudi Arabia are also named in this manner.