Who was the brother of XXX?
Giovanni Francesco Guidi di Bagno
Giovanni Francesco Guidi di Bagno (1578 -- 1641) (also known as Gian Francesco Guidi di Bagno, Gianfrancesco Guidi di Bagno, Giovanni Francesco Bagni or Gianfrancesco de' Conti Guidi di Bagno) was an Italian cardinal, brother of cardinal Nicola Guidi di Bagno and nephew of cardinal Girolamo Colonna.
Nicola Guidi di Bagno