Williams has been nominated for the manager's gong along with John Sheridan of Oldham Athletic, Paul Heckingbottom of Barnsley and Wigan Athletic's Gary Caldwell.
Meanwhile, Town's in-form front man has been nominated for the player award alongside Millwall's Jordan Archer, Bradford City's James Hanson and Barnsley's Alfie Mawson.
All winners will be announced at 6am on Friday March 11.