Ignatius Gronkowski (March 28, 1897 – September 1981) was an American professional cyclist, who represented the United States at the 1924 Summer Olympics in Paris.He held five world records for the 1/2-, 3/4-, 1.5-, and 2-mile distances.
His great-grandsons include former NFL players Glenn Gronkowski, Dan Gronkowski, Rob Gronkowski, and Chris Gronkowski.