Source : Webster's Revised Unabridged Dictionary (1913)

Flawn \Flawn\, n. [OF. flaon, F. flan, LL. flado, fr. OHG.
   flado, G. fladen, a sort of pancake; cf. Gr. ? broad. See
   {Place}.]
   A sort of flat custard or pie. [Obs.] --Tusser.