Lewis "Lou"/"Lew" Morgan Rees (7 January 1910 – 21 December 1976) was a Welsh dual-code international rugby union, and professional rugby league footballer who played in the 1930s and 1940s. He played representative level rugby union (RU) for Wales, and at club level for Treorchy RFC and Cardiff RFC, as a flanker, i.e. number 6 or 7, and representative level rugby league (RL) for Wales, and at club level for Oldham (both pre- and post-World War II) (Heritage № 306), as a prop, i.e. number 8 or 10, during the era of contested scrums.