"Rixi" Markus MBE (27 June 1910 – 4 April 1992) was an Austrian and British international contract bridge player.
She won five world titles, and was the first woman to become a World Grand Master within the World Bridge Federation.
"In a 60-year career", Alan Truscott wrote in a bridge column 15 weeks after her death, "she had far more victories with partners of assorted nationalities than anyone else has ever had." She was appointed a Member of the Order of the British Empire (MBE) for contributions to bridge in 1974.