Signaturefinder.com can locate an artist even when only a portion of their name is legible. This website allows people to put parameters on the search such as limiting the countries and time period of the artist. People may also input a portion of the artist's name into the search box.
Signaturefinder.com does not show the artist's paintings, info about the artist or their signature, but will simply locate the artist's full name. This service is completely free to use. If the artist's name isn't located then further research at a local art dealer or auction house may provide more help.