| 英文.... | European noblemen holding a duchy, ranking highest in the peerage. |
| 荷蘭語.... | Europese edellieden die in het bezit zijn van een hertogdom en als hoogste zijn geclassificeerd in de adelstand. |
| 西班牙語.... | Hombres nobles europeos que poseen un ducado, clasificandose en al más alto rango de la nobleza. |
| 公爵............ | [AS-Academia Sinica] |
| ................. | 朗文當代大辭典 p. 530 |
| ................. | 中央研究院中英雙語知識本體詞網 November 29, 2011 |
| ................. | 智慧藏百科全書網 November 29, 2011 |
| ................. | 牛津當代大辭典 p. 537 |
| kung chüeh............ | [AS-Academia Sinica] |
| ................. | TELDAP database (2009-) |
| gōng jué............ | [AS-Academia Sinica] |
| ................. | TELDAP database (2009-) |
| gong jue............ | [AS-Academia Sinica] |
| ................. | TELDAP database (2009-) |
| dukes............ | [VP] |
| ................. | Friar, ed. Dictionary of Heraldry (1987) |
| ................. | Hampson, Origines Patriciae (1846) GLOS |
| ................. | Oxford English Dictionary (1989) |
| ................. | Pine, Story of Titles (1970) IND, discussion at p. 70 |
| ................. | Webster's Third New International Dictionary (1961) |
| ................. | Random House Dictionary of the English Language (1987) |
| ................. | Candidate term Candidate term - fDA - 3/89 |
| duke............ | [VP] |
| ................. | Getty Vocabulary Program rules |
| duke's............ | [VP] |
| ................. | Getty Vocabulary Program rules |
| dukes'............ | [VP] |
| ................. | Getty Vocabulary Program rules |
| hertogen............ | [Bureau AAT] |
| ................. | AAT-Ned (1994-) |
| hertog............ | [Bureau AAT] |
| ................. | AAT-Ned (1994-) |
| duque............ | [CDBP-DIBAM] |
| ................. | Moliner, Diccionario de uso del español (2004) I:1044 |
| Subject:............ | [AS-Academia Sinica] |
| ................. | Bureau AAT, RKD |