The Collaborative International Dictionary of English v.0.48:

Scroyle \Scroyle\ (skroil), n. [Cf. OF. escrouselle a kind of
   vermin, escrouelles, pl., scrofula, F. ['e]crouelles, fr.
   (assumed) LL. scrofellae for L. scrofulae. See Scrofula,
   and cf. Cruels.]
   A mean fellow; a wretch. [Obs.] --Shak.
   [1913 Webster]