Adrianus Jacobus "Janus" Braspennincx (5 March 1903 in Zundert â 7 January 1977 in Breda) was a Dutch racing cyclist who competed in the 1928 Summer Olympics.
In the 1928 Summer Olympics, he won a silver medal as part of the Dutch pursuit team. He finished ninth in the team road race as a member of the Dutch road racing team, after finishing 27th in the individual road race.