In Scotland, the hereditary position of High Steward was given in the 12th century to Walter Fitzalan, whose descendants became the Stewart family. In 1371, the last High Steward inherited the throne, and thereafter the title of High Steward of Scotland has been held as a subsidiary title to that of Duke of Rothesay, held by the heir-apparent. Thus, currently, The Prince of Wales is High Steward of Scotland.
In Ireland, the position was sometimes known as the Hereditary Seneschal. The position was held from the 15th century by the Earls of Shrewsbury and Waterford, also the Premier Earls of both England and Ireland.
Lord High Stewards of England, 1186-1421
Lord High Stewards of England at coronations, 1422-present
Lord High Stewards of England at the Trials of Peers, 1422-present
Lord High Stewards of Scotland, ca.1150-present
Lord High Stewards of Ireland, 1446-present