Lockman

In 1780 James Alexander, lockman of Edinburgh, was by the city chamberlain paid for service at an execution 13s. 4d., with a fee of 2s. 6d. for the use of his rope.

Source: wiktionary

At his back, the lockman reached up to grasp the noose dangling from the beam.

Source: wiktionary

In contrast, Spanish hangmen had their houses painted bright red, and in France, Italy, and the Netherlands executioners' homes were located as far as possible from the main population and significant political spaces, most often being placed outside of city walls. Here, in the Scottish capital, however, the lockman was purposefully lodged just meters from the burgh's civic, spiritual, and political heart of the mercat cross, St Giles' Cathedral, and Parliament House.

Source: wiktionary

the defendent must be summoned by the Coronor or his deputy (a lockman) to appear at the next court day, when the action is called in rotation.

Source: wiktionary