co-grandfather

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Etymology

• co- + grandfather

Noun

co-grandfather (plural co-grandfathers)

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.

Synonyms

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

Related terms

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

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