William H. J. Davies (birth unknown – death unknown) was a Welsh rugby union, and professional rugby league footballer who played in the 1930s. He played club level rugby union (RU) for Llanelli RFC, and representative level rugby league (RL) for Great Britain, and at club level for Castleford (Heritage № 111) and Featherstone Rovers (Heritage № 153) as a stand-off, i.e. number 6.