Co-grandfather

Origin

• - + grandfather

Full definition of co-grandfather

Noun

1. the father of one's son- or daughter-in-law, as common grandfather of their children; the relationship between men who have grandchildren in common; maternal grandfather vis-à-vis paternal grandfather.
• 1946, September 09, , The Milkman, The milkman was Edward Kenelm Digby, 52, eleventh Baron Digby, World War I colonel in the Coldstream Guards, World War II inspector of infantry-training establishments, co-grandfather (with Winston Churchill) of Randolph Churchill's small son, Winston Churchill II.

Synonyms

• co-father-in-law (relative to the children rather than the grandchildren)

Coordinate terms

• co-grandmother
• co-grandparents

Related terms

• co-grandfather-in-law
• co-in-law
• co-uncle