The first category of zaawil arhaam consists of descendants who are not already zaawil furoodh or `asabaat, and can be split into the following three classes:
Class 1: Daughters’ Children
Class 2: Son’s Daughter’s Children
Class 3: Daughter’s Children’s Children
Again, the order here is very important. If a member of class 1 is present, any and all members of class 2 and class 3 are excluded. Similarly, class 2 excludes class 3.
The detailed rules for each class are presented below, followed by examples.