Originally Posted by mimi
thanks noodles24 for your explanation
then its a bit strange for us chinese people, coz we never choose the same names for the same family members
In America, it's quite common for first-born sons to be named after their fathers---in which case, the names are legally differentiated by "Jr." and "Sr." However, I think it's less common in Europe. Rafa's father, Sebastian, is the first-born, and I think his uncle Rafael may be the second-born.
The significance of the name "Rafael" to the Nadals could be historic. Rafa's grandfather is also Rafael. But while Rafa is "Rafael Nadal Parera" (his mother's family name is Parera), his grandfather is "Rafael Nadal Nadal."
The Nadals have lived on the island of Mallorca for seven centuries, which may explain why they are such a large and powerful family there.