1) Not a farrier or shoeing-smith but a man who worked in a ‘smithies’ or had an iron works.
1379 Johannes Cutyler
Alanus Fox, smethyman, Askwith
1417 ‘John Passelewe, smythyman, diverted the water course so that it ran to his smithies’, Thurstonland
1562 Robert Humblocke, Ecclesfeild, smethyman.