Eisert (North German: from a shortening of the ancient Germanic personal name Isenhart composed of the elements īsan "iron" + hard "hardy, brave, strong".) is a German surname. Notable people with the surname include: Brandon Eisert (born 1998), American professional baseball player Jens Eisert (born 1970), German physicist Sandra Eisert (born 1952), American photojournalist, now an art director and picture editor See also