Seventh son of a seventh son

Folklore concept

The seventh son of a seventh son is a concept from folklore regarding special powers given to, or held by, such a son. To qualify as "the seventh son of a seventh son" one must be the seventh male child born in an unbroken line with no female siblings born between, and to a father who himself is the seventh male child born in an unbroken line with no female siblings born between. The number seven has a long history of mystical and biblical significance, such as seven virtues, seven deadly sins, Seven Sleepers and Seven Heavens.

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