We have several books in our reference collection and in the stacks that might provide basic biographical information on your artist. Some of these have bibliographies that can provide further resources for your search.
The 34 volume Dictionary of Art is the most in-depth scholarly art encyclopedia in the field, containing articles on artists, movements, genres and nationalities of art.
Looking for artist information and not finding anything in the Grove Dictionary of Art? Try the Benezit, which offers more exhaustive coverage on individual artists throughout history.