Hon. Michael David Sieff (1911–1987) Marcus Sieff, Baron Sieff of Brimpton (1913–2001) Daniel Sieff (1915–1932) Judith Hannah Sieff (1921–1999) The tragic death of their son Daniel, who intended to be a scientist, at age 17 led Sieff — and with the financial support of his business partners and relatives by marriage, the Marks and Sacher families — to endow the 1934 creation, by Chaim Weizmann, of the Daniel Sieff Research Institute in Rehovot in present-day Israel. Renamed the Weizmann Institute of Science in 1949 with the Sieff family's consent, it became Israel's premier research university in the natural sciences. References 1890 births 1966 deaths People from Manchester Zionists