Euahlayi names, we have seen, are Gwaigulleeah, Light blooded, and
Gwaimudthen, Dark blooded.

The origin of this division is said to be the fact that the original
ancestors were, on the one side, a red race coming from the west, the
Gwaigulleeah; on the other, a dark race coming from the east.

A Gwaigulleeah may under no circumstances marry a Gwaigulleeah; he or
she must mate with a Gwaimudthen. This rule has no exception. A child
belongs to the same phratry as its mother.

The next name of connection is local, based on belonging to one country
or hunting-ground; this name a child takes from its mother wherever it
may happen to be born. Any one who is called a Noongahburrah belongs to
the Noongah-Kurrajong country; Ghurreeburrah to the orchid country;
Mirriehburrah, poligonum country; Bibbilah, Bibbil country, and so on.
This division, not of blood relationship, carries no independent
marriage restriction, but keeps up a feeling equivalent to Scotch,
Irish, or English, and is counted by the blacks as 'relationship,' but
not sufficiently so to bar marriage.

The next division is the name in common for all daughters, or all sons
of one family of sisters. The daughters take the name from their
maternal grandmother, the sons from their maternal great-uncle.

Of these divisions, called I Matrimonial Classes, there are four for
each sex, bearing the same names as among the Kamilaroi. The names
are--

Masculine Kumbo BROTHER AND SISTER