Isadore Seigfreid Jachman (December 14, 1922 -January 4, 1945)was a United States Army sergeant who was killed in World War II after defending the town of Flamierge in Belgium (now a deelgemeente of Bertogne) from a German attack on January 4, 1945. For his "conspicuous gallantry and intrepidity, above and beyond the call of duty"; he received the Medal of Honor.