Everyone can be. Just be a father and you'll be a brother to ur son according to bible.
Either your son or your nephew is the man.Your father's son is either you or your brother (including half-brother).If your father's son is you, then the original man is your son, (you are his father).If your father's son is your brother, then the original man is your nephew, (your brother is his father).Obviously if you have no brothers, than it must be your son.
Your father's brother's son is your first cousin.
If your father has only one son, that son cannot have a brother. Therefore the answer to the question is, "no one."
That man is your brother.
The person in question is your son. Think about it this way: Who is "your father's son"? It's you, because you have no brothers or sisters. So, you just replace "your father's son" with "you", and the riddle now reads: "...that man's father is you." Simple.
It's you. You are the son of your father, but you are not your own brother.
Either your son or your nephew is the man.Your father's son is either you or your brother (including half-brother).If your father's son is you, then the original man is your son, (you are his father).If your father's son is your brother, then the original man is your nephew, (your brother is his father).Obviously if you have no brothers, than it must be your son.
A son of your father's brother would be your cousin.
Your father's brother's son is your first cousin.
The son of your half-brother's father is not related to you when the father is not your father.
Your father's brother's son is your first cousin.
Himself(2) I think that the question has left out part of the original riddle which goes: "Brothers and sisters have I,none,/But this man's father is my father's son."'My father's son' is me (or my brother or my half-brother or my stepbrother); This man's father is me = I am this man's father = his son;This man's father is my brother = my brother is this man's father = his nephew;This man's father is my half-brother = my half-brother is this man's father = his nephew; This man's father is my stepbrother = my stepbrother is this man's father = no blood relation.If you include 'brothers and sisters have I, none' then the first option is the only valid one , he is looking at a portrait of his son.If the portrait was of himself he would be saying (this man's) = (my) father is my father's son (me or my brother) = I am my own father, or my brother is my father - which would be possible given an incestuous relationship with the mother.The comic song "I'm my own grandpa" plays with this notion and Wikipaedia cites "A proof that a man may be his own Grandfather.-There was a widow and her daughter-in-law, and a man and his son. The widow married the son, and the daughter the old man; the widow was, therefore, mother to her husband's father, consequently grandmother to her own husband. They had a son, to whom she was great-grandmother; now, as the son of a great-grandmother must be either a grandfather or great-uncle, this boy was therefore his own grandfather."
If your father has only one son, that son cannot have a brother. Therefore the answer to the question is, "no one."
Your father's brother's son is your cousin or first cousin.
To your father 'Brother', to your father's father 'Son', to you 'Uncle'.
Your father's brother's son's daughter is your second cousin.
Your father's brother's son (or daughter) is your first cousin, and is usually called by name.