There are many instruments which can be or are commonly referred to as four string guitars. Guitar family instruments with four strings Bass guitar Braguinha Cak used in Kroncong music Cavaquinho Celovic used in Tamburica orchestras Cuatro Venezolano Tenor guitar Ukulele Cigar box guitars often have three or four strings. Duitara used in Khasi music Guitar family instruments with four courses of strings The Renaissance guitar. Brac and Bugaria used in Tamburica orchestras Some Chitarra Battentes Some Kabosys Tahitian ukulele Tiple