A nom de plume is a writer's pen name, used in place of a real name on published work. Poets may choose one for privacy, to create a distinct public identity, or to separate different kinds of writing. The phrase is French and is often used interchangeably with pseudonym, though nom de plume is especially common in literary contexts.
Example
I signed the sonnet with a nom de plume,
so the page would speak before my name did.