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|Titles||baron for first born, Jonkheer|
The first known member, Guillaume Six, was a linen weaver in Armentières and Lille. During the Reformation, the family moved from Antwerp to Amsterdam and later belonged to the government of that city. Several family members were painted by Rembrandt. The name Six is an abbreviation of Sixtus, a name given to the sixth child of a family. Jan Six II (1668–1750) bought the fiefdom of Hillegom. First-born members carry the title of baron and the others the honorific of Jonkheer.
- Jan Six (1618–1700)
- Nederland's Adelsboek 93 (2008), p. 139-191.