Possibly Hadrian Dorrell is to be identified with Thomas Dorrell, who took his B.A. from Brasenose College in 1595. See Willobie his Avisa, ed. Charles Hughes (1904), p. xvi.
From the epistle To the gentle & courteous Reader prefatory to Willobie his Auisa (1594), sig. A2v; repr. in edition of G.B. Harrison (1926), pp. 14-15:
For the composition and order of the verse: Although hee (Henry Willobie) flye not alofte with the winges of Astrophell, nor dare to compare with the Arcadian shepheard, or any way match with the dainetie Fayry Queene; yet shall you find his wordes and phrases, neither Tryuiall nor absurd.