Charles "Boomer" Bowen Nicholl (19 June 1870 – 9 July 1939) was a Welsh international rugby union forward who played club rugby for Cambridge University and Llanelli. Nicholl played for Wales on fifteen occasions during the 1891 and 1896 Home Nations Championships, and was part of the historic 1893 Triple Crown winning team. Nicholl was recognised as an 'uncompromising' forward and was described as "The most distinguished member of the least distinguished college ... fond of smoking and a connoisseur of exhilarating beverages, in which strength rather than delicacy of bouquet is a predominant feature"