The WWNN is the same for both ports. For the Brocade HBA in your example the WWNN is 20:00:8c:7c:ff:30:4b:9e, and the WWPN's (also known as WWN's) are 10:00:8c:7c:ff:30:4b:9e as well as 20:00:8c:7c:ff:30:4b:9f. The WWN's are the ones which are used for WWN zoning on an FC switch.
André