MichaelAnne <ClaudiusI0@aol.com> reckons that his name was John and that his son William dsp., leaving his sisters Isabel and Agnes as his heirs.  The cited primary evidence is William's will, but that is in Latin...

That said, here is the ancestry for this John Dronsfield:

1. Geoffrey Butler (Pincerna) of Dicton
    1.1 Henry Dicton married Eva, widow of Henry de Wolvelay [Wooley].
         Died d.s.p.
    1.2 Thomas Dicton
        2.1 Margaret de Dicton [died 1316] married John de Stainton [died
            1290] See below*
            3.1 John de Stainton married Isabel [de Rockley?]. Her second
                husband Adam de Everyngham of Rockley.
                4.1 John de Stainton married Joanna Clarell. Her second
                    husband was Hugh de Toothill, son of Thomas de Toothill
                    by Modesta Eland. She was the mother of his son John de
                    Toothill, his heir.                  
                    5.1 Elizabeth de Stainton - Prioress of Kirklees Abbey
                    5.2 Alice de Stainton - a nun
                    5.3 Isabella de Stainton - given land by William de
                           Notton Nov. 30, 1338
                    5.4 Joan [Juliana] de Stainton - given land by William de
                           Notton Nov. 30, 1338
                           She married John Dronesfeld of West Bretton, co.
                           York.