What does "grandparentage" mean?

The identity and nature of one's grandparents.

What is a synonym for "grandparentage"?

Common synonyms include: parentage.

noun

noun ·Rare ·Advanced level

Noun

1
The identity and nature of one's grandparents. uncountable, usually
"a young woman of Irish grandparentage"

"a young woman of Irish grandparentage"