Is the Son of Zebede the Only Son of the Carpenter?

In mark chapter one, verse 19, says, james is the son of zebede. So does this mean that james was azebede's only son? Normally in the ancient near east, you would refer to some one as the son of their father, the son of joseph. In catholic answers encyclopaedia, andrew is also called the son of JONah. How do we know they are brothers? Well, it uses the greek word for brother, a. And when mary said, i know man, lukt bk o cay, does this indicate a vow of perpetual virginity? A, I don't think there