A nephew must be the son of either a brother or a sister.
That is so the son of my sister and your father's brother.
The boy happens to be the son of Ahmed's elder brother.
Red-Beard is the son of my younger brother, who died many years ago.
He was succeeded by the son of his brother Tarkiryan.
But, in the local custom, the son of an older brother was preferred to a claimant.
Brett, two years my senior, son of my father's older brother.
The son of my brother had some chest problems.
"The son of my own brother took the preciousness given him and used it for selfish gain."