-------+------------------+----

----------------+---------------+-------------------+------------------+----
_Purula_ | _Ungalla_ | _Kumara_ | _Umbitchana_ |Gen-
----------------+---------------+-------------------+------------------+er-
| |_Tjimmia_ |_Aperla_ |at-
| |(mother's father) |(father's |ion
| | |mother) |I
----------------+---------------+-------------------+------------------+
_Mia_ (mother, |_Ikuntera_ | | |
mother's sister)|(wife's father)| | |II
_Gammona_ | | | |
(mother's | | | |
brother) | | | |
----------------+---------------+-------------------+------------------+
| | | |
| |_Unkulla_ (father's|_Unawa_ (wife, |
| |sister's sons) |wife's sisters) |
| | |_Umbirna_ |III
| | |(wife's brother= |
| | |sister's |
| | |husband) |
- | | | |
----------------+---------------+-------------------+------------------+
_Gammona_ (son's|_Umba_ | | |
wife) |(sister's | | |IV
|children) | | |
| | | |
----------------+---------------+-------------------+------------------+
| |_Tjimmia_ | |
| |(daughter's child) | |V
---------------+---------------+-------------------+------------------+----

In the Wathi-Wathi system, we observe that in each generation there are
two groups of males and two of females, corresponding to the two-phratry
system, which are distinguished by names differing for each genera