The Amsterdam painter, Jacob Cornelisz, established one of the largest and most diversified workshops of his time. In this paper, the authors build on the research associated with the exhibitions as well as discoveries made by Amsterdam archivist, S.A.C. (Bas) Dudok van Heel, in publishing the genealogy that included Jacob Cornelisz along with other painters known as Cornelis Buys. These insights open up possibilities for new attributions, allowing the identification of one workshop assistant
as Cornelis Jacobsz alias Cornelis Buys, Jacob Cornelisz’s eldest son, and the identification of another assistant, the Berlin Sketchbook Master, as Jacob’s grandson, Cornelis Anthonisz. This, in turn, reveals hitherto unknown contributions made to Jacob’s shop by Jan van Scorel after his return from Italy in 1524.
Meuwissen, D., & Faries , M. (2018). Identifying Two Family Members in Jacob Cornelisz’s Amsterdam Workshop: Cornelis Buys and Cornelis Anthonisz. In A. Dubois, J. Couvert, & T-H. Borchert (Eds.), Technical Studies of Paintings: Problems of Attribution (15th-17th Centuries): Papers presented at the Nineteenth Symposium for the Study of Underdrawing and Technology in Painting held in Bruges, 11-13 September 2014 (pp. 298-308). (Underdrawing and Technology in Painting. Symposia; Vol. 19). Leuven: Peeters.
You can read the article (behind a paywall) here.