The term 'Guitar Relative' refers to four different stringed instruments: the uke (3 letters), LUTE (4 letters), SITAR (5 letters), and banjo (5 letters). The uke is a small, four-stringed instrument that originated in Hawaii and is typically associated with Hawaiian music. The LUTE is a plucked string instrument that has been around since the Middle Ages and is popular in classical and folk music. The SITAR is a long-necked string instrument from India that is used in Hindustani classical music. Finally, the banjo is a four- or five-stringed instrument that originated in the United States and is commonly used in bluegrass and country music.