From Wikipedia:
Sir Nicholas George Winton, MBE (born Nicholas Wertheim; 19 May 1909 – 1 July 2015) was a British humanitarian who organised the rescue of 669 children, mostly Jewish, from Nazi-occupied Czechoslovakia on the eve of the Second World War in an operation later known as the Czech Kindertransport. Winton found homes for the children and arranged for their safe passage to Britain.[1] After the war, Winton did not discuss his efforts with anyone; his wife found out what he had done only after she discovered a scrapbook in their attic in 1988, detailing the children's parents and the families that took them in.
https://en.wikipedia.org/wiki/Nicholas_Winton
https://en.wikipedia.org/wiki/Kindertransport