Miller

wiktionary

ref

From Middle English miller, meller, millere, from earlier mylner, mylnere, milnere, from Old English *myllere, *mylnere, perhaps an assimilation or corruption of Old English mylnweard(“mill-keeper”), or from late Proto-Germanic *muljāriaz, *mulinārijaz(“miller”), equivalent to mill +‎ -er; cf. also Late Latin molīnārius. Cognate with Saterland Frisian Muller(“miller”), Dutch mulder, molenaar(“miller”), Low German Möller(“miller”), German Müller(“miller”), Danish møller(“miller”), Norwegian Bokmål møller(“miller”), Norwegian Nynorsk mylnar, møllar(“miller”), Swedish mjölnare(“miller”), Icelandic mylnari(“miller”).

etymonline

ref

miller (n.)

"one who grinds grain in a mill," mid-14c. (as a surname by early 14c.), agent noun from mill (v.1). In Middle English both with and without the -n-. The Old English word was mylnweard, literally "mill-keeper" (preserved in surname Millward, which is attested from late 13c.).