Webster's Revised Unabridged Dictionary · 1913

Rodomont

Rodomont , noun

[French rodomont, Italian rodomonte, from Rodomonte, Rodamonte, a boasting hero in the “Orlando Furioso” of Ariosto, and the “Orlando Innamorato” of Bojardo; properly, one who rolls away mountains; Prov. Italian rodare to roll away (from Latin rota a wheel) + Italian monte a mountain, Latin mons. See Rotary, Mount, n.]

A vain or blustering boaster; a braggart; a braggadocio.
Orlando Furioso — Sir T. Herbert
Orlando Innamorato

Rodomont , adjective

Bragging; vainly boasting.