chhin-ke-kong親家公

co-father-in-law

co-father-in-law; father of one's parent's sibling's spouse; father of one's co-parent-in-law

English Wiktionary, “親家公” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E8%A6%AA%E5%AE%B6%E5%85%AC · confidence: Medium (Wiktionary)