« Reply #1 on: Saturday 19 May 18 16:54 BST (UK) »
I would image it derives from the province of Maine (de Maine - of Maine), capital Le Mans. It was held by the Kings of England from 1150s to c1210, and again from c1420-50, and I suppose quite a few locals my have moved to England at one time or another. It would be similar to the surnames Fleming (Flanders) or Gascoigne (Gascony)
Bumstead - London, Suffolk
Plant, Woolnough, Wase, Suffolk
Flexney, Godfrey, Burson, Hobby - Oxfordshire
Street, Mitchell - Gloucestershire
Horwood, Heale Drew - Bristol
Gibbs, Gait, Noyes, Peters, Padfield, Board, York, Rogers, Horler, Heale, Emery, Clavey, Mogg, - Somerset
Fook, Snell - Devon
M(a)cDonald, Yuell, Gollan, McKenzie - Rosshire
McLennan, Mackintosh - Inverness
Williams, Jones - Angelsey & Caernarvon
Campbell, McMartin, McLellan, McKercher, Perthshire