| | The Great Library at Arrakis |
 | | Duncan was born a slave on Giedi Prime in "House Atreides" and escaped to Caladan at the age of 9 and where Leto mentioned of his intention to send him for training with House Ginaz. |
 | | However, in the Encyclopedia, Duncan was born on Caladan and apprenticed to House Ginaz where he was captured and enslaved on Grumman during a war of Assassins between Houses Ginaz and Moritani. |
 | | Later, at the age of 22, Duncan was sold to House Harkonnen for slavery on Hagal where he was later rescued by the Atreides. |
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