A communication apparatus includes a communication portion for communicating with an external device, a transmitter information acquiring portion for acquiring predetermined transmitter information for identifying the transmitter at a time of an incoming call of communication, a storage portion for storing a registered name in association with the transmitter information in advance, a registered name retrieval portion for, retrieving the registered name stored in the storage portion so as to be associated with the acquired transmitter information, a common part extraction portion for, in a case where a plurality of registered names are retrieved with respect to the acquired transmitter information when the registered name is retrieved by the registered name retrieval portion, extracting a common part among the plurality of registered names, and an output portion for outputting the common part of the registered names which is extracted by the common part extraction portion, in a predetermined system.