The Tokugawa shogun family lineage (a male lineage through Ieyasu TOKUGAWA's third son Hidetada) died out in 1716 with the death of Ietsugu TOKUGAWA at only the age of eight.
享保元年（1716年）に第7代将軍・徳川家継がわずか8歳で早世し、徳川将軍家の血筋（徳川家康の三男・徳川秀忠の男系男子）が絶えた。