D'Este, however, was not electable. The cardinals of Pius V (some twelve or thirteen votes) were joined with many of those of Pius IV to prevent the election of d'Este, but also of Farnese, Ricci, and Burali d' Arezzo. Cardinal Giovanni Morone was also a candidate again, but Cardinal Bonelli (Alessandrino, the nephew of Pius V) was prepared to use his votes to exclude him. His friends nonetheless made an effort to have him elected by acclamation on the opening day of the Conclave, 12 May, but the attempt failed.