A formal Irish name consists of a given name and a surname. In the Irish language, most surnames are patronymic surnames (distinct from patronyms, which are seen in Icelandic names for example). The form of a surname varies according to whether its bearer is a man, a woman, or a woman married to a man, who adopts his surname.
An alternative traditional naming convention consists of the first name followed by a double patronym, usually with the father and grandfather's names. This convention is not used for official purposes but is generalized in Gaeltachtaí (Irish-speaking areas) and also survives in some rural non-Gaeltacht areas. Sometimes the name of the mother or grandmother may be used instead of the father or grandfather.