Feudal Rank 公  Impartiality Open Public Common Sire

公 

‘impartiality, (something) open, public, common’; ‘sire, lord’ (also used as a polite form of address); a feudal rank conventionally translated as ‘duke’; also a title commonly used in the posthumous names of feudal lords in the Eastern Zhou period (as in 齊桓公 ‘Lord Huán of

Qi’, the first of the Five Hegemons, whose feudal rank was actually 侯 ‘marquis’) 

gōng