Namesakes
Álvaro de Castro
(m) 1878-1928 
Portuguese Presidents and Prime Ministers 1920; 1923-1924 (prime minister)
José Luciano de Castro
(m) 1834-1914
Portuguese Presidents and Prime Ministers 1886-1890; 1897-1900; 1904-1906 (prime minister)
José de Castro
(m) 1868-1929
Portuguese Presidents and Prime Ministers 1915 (prime minister)
Joaquim Pimenta de Castro
(m) 1846-1918
Portuguese Presidents and Prime Ministers 1915 (prime minister)