Given the following context:

Diaz followed Imelda Marcos, the former First Lady of the Philippines, for a month and interviewed her daughter Imee and her son Ferdinand, Jr. The film incorporates third party interviews and archive material; it recounts Imelda's life, including her marriage to her husband, Philippine president Ferdinand Marcos. Discussing the Marcos presidency, Imelda says that there were no human rights abuses in her country; she says that her husband abolished Congress and declared martial law in 1972 to protect democracy. She says that she took 3,000 pairs of shoes with her when she went into exile, and justifies her extravagant clothing by saying that it "inspired the poor to dress better". She also says that she had enormous museums and theaters constructed to enrich the lives of Filipinos.Imelda says in one vignette that she had met United States Army General Douglas MacArthur during his landing in Tacloban at the end of World War II, and that McArthur insisted that she should perform for the composer Irving Berlin, She sang "God Bless the Philippines" and when Berlin asked her why she sang the lyrics incorrectly she said, "what's the difference between America and the Philippines?" The assassination attempt on Imelda and the assassination of Benigno Aquino, Jr. are featured in the film. Footage from parties held by the Marcos couple, including one during which actor George Hamilton sang "I can't give you anything but love, Imelda", are also used in the film.

answer the following question:

What is the last name of Ferdinand, Jr.? 

Marcos