公公 Traditional form: 公公 Pinyin (reading): gōnggong Definitions: husband's father; father-in-law grandpa; grandad (old) form of address for a eunuch Characters: 公 - fair, equitable; public; duke 公 - fair, equitable; public; duke Traditional characters: 公 - fair, equitable; public; duke 公 - fair, equitable; public; duke