User talk:2600:1702:3F0:4A70:39C9:F4:D655:373A

Al Roker
You are incorrect. See Cousin. If their grandfathers are brothers, then that makes their common ancestor a great-grandparent (the parent of the brothers). Looking at the table, a common great-grandparent makes them second cousins. Jauerbackdude?/dude. 12:38, 6 October 2020 (UTC)