Noun
The father of one's grandfather or grandmother.
Source: Webster's dictionarygreat grandfather
Adams's maternal great-grandfather, Michael Hannaway, was also a member of the IRB during its dynamiting campaign in England in the 1860s and 1870s. Source: Internet
Although Arndt was homosexual, like his great-grandfather Friedrich (Fritz) Krupp, he married but was childless. Source: Internet
After the Battle of Culloden in 1746, Grieg's great-grandfather, Alexander Greig, Nils Grinde. Source: Internet
Hoguet, an American, only learned in 2018 that his great-grandfather had set up a foundation for mental health and neurological conditions more than a century earlier, naming it in memory of his childless brother Nathaniel. Source: Internet
His great-grandfather died the year he was born and his grandfather became the new Sultan, Selim II. Source: Internet
After all, hadn't his great, great grandfather been one of those Campbells who'd come from the area over around New Brunswick and his grandfather looked exactly like the pictures of the Indians in all the history books. Source: Internet