Lothian is a term used to describe a region in the east of Scotland, located on the southern shore of the Firth of Forth. Within this region, there are several towns and cities, including Edinburgh, Musselburgh, and Haddington. Synonyms for Lothian may include the Lothians, East Lothian, West Lothian, Midlothian, and the Lothian region. Each of these synonyms refers to the same geographic area and can be used interchangeably. The name Lothian is believed to come from the Brythonic word 'low-ten', which means 'the land of the loud waters'.