you would be cousin in laws
Your daughter's son is your grandson and you are his grandma or grandpa.
yes
To be related means that you are family somehow, whether it be by immediate family (brother, sister, mother, father) or another branch of family (aunt, grandpa, great-great grandma).
Yes, because if your related to your grandpa you are related to his siblings. The children of your grandfather's brothers are your first cousin's, once removed.
Half-fourth cousins
If its Aunt by full blood then you related both same 50%.
Yes, she is your great aunt.
Grandpa
There are many terms. Most formal would be "Vecamate" or "Vecmamina", however "ome", "vecmamma" or "vecamamma" are typicaly used in conversations.Here's an audio recording for Grandmother in Latvian, Vecmāte (Vec-mā-te):See related links
yep. my other grandpa!
She met him in japan on the nude beach
If your friend's great grandmother was the sister of your great grandfather, then you are third cousins. The children of siblings (brothers and sisters) are first cousins. The grandchildren of siblings are second cousins. The great grandchildren of siblings are third cousins.