Sir John Chichester - Sir John Chichester brother of Sir Arthur Chichester

How many brothers did he have?

According to "Tudor Place" (http://www.tudorplace.com.ar/COURTENAY2.htm#Gertrude%20COURTENAY1), Gertrude Courtney-Chichester had 15 children of which 6 were males. One was Arthur,, the future Lord Deputy of Ireland, and the others were John, Charles, Adrian (I assume a male), Edward, and John 'the younger" whom I assume, as was his older and deceased brother of the same name, was named for his father..
However, I believe that the second John may have been listed as another child by mistake. That would have to be researched.