Itzikl Kramtweiss (c. 1878 - 1958) or Krantweiss, also known by the anglicized name Isadore Krantweiss, was a Russian-born American klezmer musician and recording artist of the early twentieth century. He was leader of the Broder Kapelle, a popular klezmer orchestra in Philadelphia which made recordings for the Victor Recording Company in the late 1920s.