Your grandfather's daughter-in-law could be your mother or your aunt by marriage.
Your mother's brother is your uncle and his son is your first cousin.
The brother of your aunt by marriage (the wife of an uncle) is not related to you, and neither is his son.
Your grandmother's son is either your father or your uncle.
Your grandmother's aunts son was your grandmother's first cousin, and your first cousin, twice removed.
your son is your great grandsons grandfather.
Charles, Lothiar, and Louis are Charlemange's grandsons but his son's name is unknown.
the empire was divided among Charlemagne's grandsons
The answer to this riddle is a grandfather. A grandfather has no father, cannot have a son directly, but can have a grandson through their own child who has a son (grandchild).
The sons of your son-in-law's siblings are his nephews. You are not related to them.However, your son-in-law is married to your daughter. The sons of her siblings are also your son-in-law's nephews. They are your grandsons.
Charlemagne's grandsons were the three sons of his son Louis the Pious. They were Lothair, Charles the Bald, and Louis the German. These grandsons played significant roles in the division of the Carolingian Empire after Louis the Pious's death.
Augustus had four adopted sons. they were his three grandsons, Gaius, Lucius and Agrippa Postumus and Livia's son, Tiberius.
Your son would be the uncle of his brother's son.
Although this is disputed, the most likely answer is three. 1. Qasim, son of Khadija. 2. Abdullah, who is also known as Tahir ("pure") and Tayyib ("good"), son of Khadija. 3. Ibrahim, son of Mariya. All three of these sons died in infancy.
Your son and your niece are first cousins.
Your Uncle's son is your first cousin.
Your nephew's son is your great nephew.