Unidentified artists,

In art history, a Notname, "necessity-name" or "contingency-name") is an invented name given to an artist whose identity has been lost. The practice arose from the need to give such artists and their typically untitled, or generically titled works, an acceptable if unsatisfactory grouping, avoiding confusion when cataloging. The phrases provisional name, name of convenience and emergency names are sometimes used to describe anonymous masters; nonce name was at one time used.

The practice of using generic names for unidentified artists is most common in the study of art of the antiquity, especially of the Roman era or with artists of the Northern Renaissance. Typically a pseudonym is applied after commonality is established for a grouping of works, of which a similarity of theme, style, iconography, biblical source or physical location can probably be attributed to one individual or workshop, but because of lack of surviving documentary record, the name of that individual is lost. In the case of 14th and early 15th-century Netherlandish, French and German painters and illuminators, the problem is particularly acute and stems from a number of factors. Primarily, the practice of signing and dating works is rarely seen in the region until the 1420s, and the inventories of collectors were uninterested in the artist's names. Many of the unidentified late 14th and early 15th-century northern artists were of the first rank, but because they have not been attached to any historical person, have suffered from academic neglect. It is probably a truism to say that, as Susie Nash put it, "much of what cannot be firmly attributed remains less studied". Some art historians believe that this has led to a lack of caution in connecting works with historical persons, and that such connections often hang on thin threads of circumstantial evidence. The identities of a number of well-known artists have been founded on the basis of a single signed, documented or otherwise attributed work, with similar works sharing close style or within a geographical range also attached to that name.