库伯 is the standard transliteration of 'Cooper' (and the Dutch 'Kuiper'). Famous bearers in Chinese subtitles include actor Bradley Cooper and astronomer Gerard Kuiper, after whom
库伯带 'the Kuiper Belt' is named. Each character is purely phonetic —
库 (kù 'storehouse') for 'Coo-',
伯 (bó 'uncle') for '-per'.
