Lockie is a diminutive form of the given name Lachlan, which is of Scottish origin. The name Lachlan itself is derived from the Gaelic name 'Lachlann', meaning 'land of the lochs' or 'from the fjord-land'. Lockie, as a given name, is often used as a nickname for Lachlan, reflecting a more informal or affectionate usage. As a surname, Lockie is a variant of Lucas, which has Latin origins meaning 'light' or 'illumination'.