Jan Cornets DeGroot or Johan HugoDeGroot Latinized as Janus Grotius (8 March 1554 – 3 May 1640) was a Dutch nobleman and scholar who conducted experiments
HugodeGroot (Latinized HugoGrotius). In the same year the three young men returned to their home town via Flanders. On February 5, 1630, Dirk de Graeff