1. A system to generate an index for a closest match search, the system comprising: a processor; a memory in data communication with the processor for storing information; a corpus processing module executable by the processor that is operable to access a corpus of information that includes a plurality of member information, the plurality of member information including first member information that describes a first member and other member information that describes other members; and an index generating module executable by the processor that is operable to generate a plurality of candidate signatures based on the corpus of information, the plurality of candidate signatures including a first plurality of candidate signatures and a second plurality of candidate signatures, the index generating module to generate the first plurality of candidate signatures based on the first member information and to generate the second plurality of candidate signatures based on the other member information, the index generating module to identify a plurality of index signatures based on the plurality of candidate signatures, the plurality of index signatures including a first plurality of index signatures, the first plurality of index signatures further included in the first plurality of candidate signatures and not included in the second plurality of candidate signatures to signify the first member and not any one of the other members, the index generating module to store the plurality of index signatures in an index in association with the first member to enable a closest match of input information to at least one of the plurality of index signatures to identify a closest match of the input information to the first member over the other members, the index generating module is to generate a first plurality of candidate signature scores respectively associated with the first plurality of candidate signatures, the first plurality of candidate signatures includes a first candidate signature and a first candidate signature score that is associated with the first candidate signature, the first candidate signature score represents a percentage of coverage of the first signature over the first member information.