Siewert is the surname of: Alfons Siewert (1872-1922), Ukrainian physician Brian Siewert, television composer Clara Siewert (1862–1945), German Symbolist painter, graphic artist and sculptor Eva Siewert (1907–1994), German writer Jake Siewert (born 1964), former White House Press Secretary; Goldman Sachs (2012– ) Rachel Siewert (born 1961), politician Robert Siewert (1887–1973), politician and prisoner Ruth Siewert (1915–2002), German contralto Steven Siewert, photojournalist See also Sievert Surnames from given names