As defined by Lord Phillips of Worth Matravers in Shogun Finance Ltd v Hudson  1 AC 919 at p.963:
Words in a language have one or more ordinary meaning, which will be known to anyone who speaks that language. Names are not those kind of words. A name is a word, or a series of words, that is used to identify a specific individual. It can be described as a label. Whenever a name is used, extrinsic evidence, or additional information, will be required in order to identify the specific individual that the user of the name intends to identify by the name - the person to whom he intends to attach the label. Almost all individuals have two or more names which they use to identify themselves and where a name is mentioned in a particular context, or a particular milieu, those who hear it may have the additional information that they need to identify to whom the speaker is referring.