Eugene Grebenik
Eugene Grebenik ( ; 20 July 1919 – 14 October 2001 ) , known as "Grebby" , was a Soviet-born British civil servant who was a central figure in the development of demography in Britain . 
<triplet> Eugene Grebenik <subj> 20 July 1919 <obj> date of birth <subj> 14 October 2001 <obj> date of death <subj> demography <obj> field of work