The musimon is an heraldic monster said to be a combination of a goat and a ram, with the horns of both. It’s considered a period charge, described (though not attributed) by Guillim, 1610 . The Society grants no difference between the musimon and the goat.
Gideon ap Stephen bears: Per bend sinister argent and sable, a musimon rampant counterchanged.
Thomas von Wildtstein bears: Per pale gules and sable, a musimon rampant contourny within a bordure Or.
Oda Wlslagre dicta Widoeghe bears: Gules, a musimon rampant argent spotted sable and in chief two wool combs fesswise Or.