Demetrius/Dimetrius "Dimmy" Frank/Franks (first ¼ 1876 – second ¼ 1954) was a Welsh rugby union, and professional rugby league footballer who played in the 1890s and 1900s. He played club level rugby union (RU) for Cardiff RFC, and club level rugby league (RL) for Hull FC, as a stand-off or scrum-half, i.e. number 6, or 7.