Joseph
“Is the current Brisker Rov referred to as Der Rov, in the same way Reb Velvel is?”
The Brisker Rav was/is called ‘De Ruv’ by all Brisker Talmidim as he was actually A RAV i.e גאב”ד in the city of Brisk.
Hence I don’t understand what “current” Rov you are referring to?