Board Thread:General Discussion/@comment-5808856-20150312001702/@comment-27486423-20151116050025

Aardvarkbanana911 wrote: OnlyOnTuesdays88 wrote: Aardvarkbanana911 wrote: Dragonian King wrote:

Aardvarkbanana911 wrote: Stanford is Grunkle Stan. Stanley Pines is Grandpa Stan. The Grunkle Stan we know is Stanley, and the Author is Stanford. Stanford, the Author, is their great-uncle, and Stanley is their grandfather.

Neither are their grandfather. This was confirmed in the preview. I still hope they're keeping that a secret and it turns out not to be the case but for now they're both great uncles unless we learn otherwise. So... they have another brother who's the grandpa of Dipper and Mabel?

Their grandparent is Shermie Pines. In "A tale of two Stans" Stanford says "I have a niece and nephew?" And Stan says: "yeah. Shermie's grandkids. Also in the flashbacks of their stories there was a baby. Shermie was probably the youngest.