What was the date of death for XXX?
L. E. J. Brouwer
Luitzen Egbertus Jan Brouwer ForMemRS (Dutch: (ˈlœy̯tsə(n) ɛɣˈbɛrtəs jɑn ˈbrʌu̯ər); 27 February 1881 -- 2 December 1966), usually cited as L. E. J. Brouwer but known to his friends as Bertus, was a Dutch mathematician and philosopher, a graduate of the University of Amsterdam, who worked in topology, set theory, measure theory and complex analysis.
2 December 1966