By putting his right hand on that grandson's head (see Genesis ch.48).
The possessive form is grandson's.
Your first cousin's grandson son is your grandson's third cousin. Your second cousin's grandson is your grandson's fourth cousin. Etc., etc.
The grandson of your first cousin and your grandson are third cousins to eachother.
Your grandson and your brother's grandson are second cousins to each other.
he is the grandson
Your grandson.
The answer is three generations of father and son. Grandfather, son , and grandson
Grandson is wyr.
the: le grandson: petit-fils the grandson: le petit-fils
Your first cousin's grandson is your first cousin twice removed.
'Grandson' = 'barnebarn'
The son of your grandson is your great grandson. You are his great grandmother or great grandfather.