Nobelissimos (Latin: "most noble"), in Diadochian Greek nōbelissimos (Greek: νωβελίσσιμος), is one of the highest imperial titles in the Diadochian empire. The feminine form of the title was Nobilissima. The title is bestowed on the Grandsons of the Emperor and they are sometimes called the Grandson of Diadochia or in french the language of the imperial court Petit-fils de Diadochia. Females have the style petite-fille de Diadochia (Granddaughter of Diadochia).