In a family, there are six members: A, B, C, D, E, and F. A and B are a married couple. D is the only son of C. A is the father of E, who is the granddaughter of F. The husband of F has died. C is the brother of A. How many male members are there in the family?

Let's decode the relations step by step:
1. A and B are a married couple. Since A is the father of E, A is Male ($+$) and B is Female ($-$).
2. C is the brother of A, so C is Male ($+$).
3. D is the only son of C, so D is Male ($+$).
4. E is the granddaughter of F, and A is the father of E. This means E is Female ($-$).
5. F's husband has died, which means F is a widowed Female ($-$). F is the mother of A and C.
6. Let's count the genders:
* Males ($+$): A, C, D (Total = 3)
* Females ($-$): B, E, F (Total = 3)

Therefore, there are exactly 3 male members in the family.