What is Unknown?

Legal Definition
When goods have been stolen from some person unknown, they may be so described in the indictment; but if the owner be really known, an indictment alleging the property to belong to some person unknown is improper. 2 East's P. C. 651 1 Hale, P. C. 512; Holt's N. P. C. 596 S. C. 3 Engl. Common Law Rep. 191; 8 C. & P. 773. Vide Indictment; Quidam.
-- Bouviers Law Dictionary