In other words, siblings are grouped together with parallel cousins, while separate terms are used for cross-cousins.

There is no preference for marriages between matrilateral parallel cousins.

Sometimes parallel cousins are forbidden as spouses and cross-cousins are favoured.

However, parallel cousins who may in reality be half-siblings are also likely to have lived in the same household.

So, another possible explanation is that in a polygynous society, the parallel cousins will be much more likely to grow up together than the cross-cousins.

In effect, the parallel cousins are as familiar as siblings.

She would be considered a parallel cousin who is treated as a sister.

Both parallel cousin and cross cousin marriages are preferred.

Cross cousin and parallel cousin are not given an equal status.

Children of one's Parents, i.e. parallel cousins, are considered siblings.