With Clara, his first wife, Kirchhoff had two sons and two daughters and he was left to bring them up on his own in 1869 when Clara died.
Sa Clara, ang kanyang unang asawa, Kirchhoff nagkaroon ng dalawang anak at dalawang anak at siya ay kaliwa upang dalhin ang mga ito hanggang sa kanyang sariling sa 1869 kapag Clara namatay.