Co-grandfather

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 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.

    "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

All synonyms
co-father-in-law

Example

More examples

"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."

Etymology

* co- + grandfather

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.