Perez
Improved:
You can't really pick one to be a "popular" last name, there is a whole lot of Abreu, Vargas, Castillo, Cruz, Marte, and other spanish last names. There are alot of uncommon ones as well, but you tend to meet many typical spanish surnames.
Castro If by popular you mean most common then it would have to be Martinez, Lopez, and Perez. Castro is not all that common nor is it very popular with the citizens of Cuba.
The most popular name right now in Puerto Rico is mike. The family of mike rotch is very popular in puerto rico so mike started to become extremely popular.
Josephina
The communist nation of Cuba is home to many people. In the population the most common last name is Castro.
The most popular last name in India is Patel.
The most popular last name in Russia is IVANOV.
Garcia. It is the 8th most popular last name in America, making it the 1st most popular HISPANIC last name in America.
Well its not really a popular last name its Reed.
The most popular last name I would think would be... Young, Thomas, or Williams
The most popular last name in Croatia is Babić.
The most popular surname is Cohen.
Nguyen is a popular last name in Vietnam.
The most popular last name in North Korea is Kim. Other popular last names in North Korea include Park and Lee.
The most popular boy's name of the last 100 years is John. The most popular girl's name of the last 100 years is Elizabeth.
The most popular baby name starting with D for boys last year was Dylan. It is often the most popular boys name starting with D. The most popular name overall was Aiden.