The term 'member of the violin family' refers to two instruments: the FIDDLE and the CELLO. The FIDDLE is a six-letter stringed instrument that is similar to the violin but has a more rustic sound. It is often used in folk music, bluegrass, and country music. The CELLO is a five-letter stringed instrument that is larger than the violin and has a deeper, more resonant sound. It is commonly used in classical music, jazz, and popular music. Both instruments are members of the violin family and are essential components of many musical genres.