The Collaborative International Dictionary of English v.0.48:
Flo \Flo\ (fl[=o]), n.; pl. Flon (fl[=o]n). [AS. fl[=a],
   fl[=a]n.]
   An arrow. [Obs.] --Chaucer.
   [1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Flon \Flon\, n. pl.
   See Flo. [Obs.] --Chaucer.
   [1913 Webster]