In function, the system is extremely similar to the Crow system. However, whereas Crow groups are matrilineal, Omaha descent groups are characteristically patrilineal. In this system relatives are sorted according to their descent and their gender. Ego's father and his brothers are merged together under a single term and a similar pattern is seen for Ego's mother and her sisters. Like most other kinship systems, Omaha kinship distinguishes between Parallel and Cross cousins. While Parallel cousins are merged with siblings, Cross cousins are differentiated by generational divisions. On the maternal side Cross cousins are raised a generation (making them Ego's Mother's Brother and Ego's Mother) while those on the paternal side are lowered a generation (making them the generational equivalent of Ego's Children's).