The name Murdoch is a boy's name meaning "mariner". Murdoch.
From the experts:
Murdoch and its more popular modern variant Murdo are traditional given names in Scotland, although they are almost exclusively encountered as surnames outside of their native country. Famous bearers include media mogul Rupert Murdoch and novelist Iris Murdoch. The Murdoc spelling was used for the fictional bassist and founder of the virtual indie band Gorillaz.