Danny and Joe are from two different countries and have a similar surname. However, surname does not determine brotherhood as they are not from the same family background. Also, Danny had only two sisters.
According to Wikipedia, Danny Devito has two siblings, Angela Lucia and Theresa Devito Scialla. These two are no more with Danny. Angela died at 85, whereas Theresa was at age 80. Angela has completed her graduation from Asbury Park High School.
Also, Angela later joined Wilfred Academy. She has unlatched Angela’s Beauty Salon. Additionally, Theresa has joined Forth Monmouth as an inventory management specialist. She died in Interlaken, New Jersey, United States. on July 1, 2014.
