Thaddäus "Thaddy" Robl (22 October 1877 – 18 June 1910) was a German professional cyclist who was active between 1894 and 1910, initially in road racing, later predominantly in motor-paced racing.From 1895 to 1898 he obtained several podium finishes in long distance road races, the most emblematic of which is his 3rd place in the 1898 Bordeaux - Paris. In motor-paced racing he won five European titles (1901–1904, 1907) and the world championships in 1901 and 1902, he finished in third place in 1903.