Save Type Surname (from nickname) Usage Turkish Pronounced Pron. buy-yuy-KUYS-tuyn [key] Other Forms FormsBuyukustun, Büyüküstünkollu, Büyüküstündağ Meaning & History From Turkish büyük "big, grand" and üstün "superior, high". A famous bearer is Turkish actress Tuba Büyüküstün (1982-).