Marshall Kirk McKusick gave a talk on the history of
the BSD Daemon:
https://www.youtube.com/watch?v=AeDaD-CEzzg
"This video tells the history of the BSD Daemon. It
starts with the first renditions in the 1970s of the
daemons that help UNIX systems provide services to
users. These early daemons were the inspiration for
the well-known daemon created by John Lasseter in the
early 1980s that became synonymous with BSD as they
adorned the covers of the first three editions of `The
Design and Implementation of the BSD Operating System'
textbooks. The talk will also highlight many of the
shirt designs that featured the BSD Daemon."