It is possible in some descent systems for a man to belong to both a patrilineage and a matrilineage at the same time.

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In some descent systems, such as some societies in Southeast Asia, a person can belong to both a patrilineage (tracing descent through the father's lineage) and a matrilineage (tracing descent through the mother's lineage) simultaneously. This is known as double descent.

It Is Possible in Some Descent Systems for a Man