Meanings
plural co-grandfathers
- 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.
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.
1946 September 9, “The Milkman”, in Time, archived from the original on 19 Feb 2011Synonyms: co-father-in-law
Synonyms & antonyms
nounthe 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.
Origin
Cite this entry
co-grandfather. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/co-grandfather
“co-grandfather.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/co-grandfather. Accessed November 5, 2026.
WatkinsX Dictionary, s.v. “co-grandfather,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/co-grandfather.
Source: co-grandfather on Wiktionary, CC BY-SA 4.0.