Cogger

词干

‘ship of burden’

后缀

-er: (added to verbs) A person or thing that does an action indicated by the root verb; used to form an agent noun. · (added to verbs, informal) A person or thing to which the root verb is done or can be done satisfactorily.

From cog (“ship of burden”) +‎ -er, hence an occupational surname for a boat or cog builder or, more likely, for a sailor or master of a cog.