People that encountered network security probably know the name "Bro" much better. Apparently they rebranded in 2018.
Wikipedia has the following to say about it:
> Dr. Paxson originally named the software "Bro" as a warning regarding George Orwell's Big Brother from the novel Nineteen Eighty-Four. In 2018 the project leadership team decided to rename the software. At LBNL in the 1990s, the developers ran their sensors as a pseudo-user named “zeek”, thereby inspiring the name change in 2018.