Yeoman is also a naval occupation, roughly equivalent to a secretary.
Compare Yeomen of the Guard.
A Gilbert and Sullivan operetta was entitled Yeomen of the Guard.
In the British Army during World War 1, the Territorial cavalry regiments were designated Yeomanry (for example, 'The 1/1st Warwickshire Yeomanry Regiment') though as the war progressed many regiments fought as dismounted infantry.