An alias referring to a visual artist - usually one that tends to draw or sketch, though it can apply to an artist that works with mediums other than pencils. The term originated from the alias 'pen name' referring to a writer.
Clarissa is still working on that book, she says her pen name is 'Clarisse'." "Hah! Naz is working on the cover, guess she'll have to come up with a pencil name.