Leith is a name of Scottish origin, derived from the Gaelic word "Leathad", which means "slope" or "bank". It was originally used as a placename, referring to the town of Leith in Scotland, but has since evolved into a given name for boys and girls. The town itself is situated on the coast of the Firth of Forth, near Edinburgh, and its historical significance includes being the former port of Edinburgh. The name Leith may have also been influenced by the Old Norse word "hlytha", meaning "to bend" or "to bow". In some cases, it might be confused with other names such as Leigh or Leah due to their similar pronunciation.
"The name Leith experienced its peak popularity in the mid-20th century, with a noticeable decline by the late 1970s."