great-grandfather-in-law

== English == === Etymology === From great-grandfather +‎ -in-law. === Noun === great-grandfather-in-law (plural great-grandfathers-in-law) A great-grandfather of one's spouse. ==== Related terms ==== great-grandmother-in-law great-grandparent-in-law great-granddaughter-in-law great-grandson-in-law ==== Translations ====