Various Spellings of Boyett: Armorial General Rietstap (French) No exact matches to Boyt Boyett or Boyette
http://archive.org/details/armorialgnra01rietuoft/page/278/mode/2up?view=theater

http://www.coats-of-arms-heraldry.com/armoriaux/rietstap.html

http://www.familycrestsearch.org/Rietstap%27s-Armorial-General.html

Rietstap Armorial General.
Blazon is Silver, three blue diagonal bands, red upper third with three gold coins.
Above the shield and helmet is the crest which has three plumes.

Names and descriptions from the Armorial General by JB Rietstap
http://archive.org/stream/armorialgnra01rietuoft#page/278/mode/2up

Boyat
Argent, three bands Azure, a chief gules, charged with three bezants Golden.
ENGLISH = Of money, to three azure bands, to the boss of mouths, loaded with three besants of now.

BOYETET
Azure, a chevron, accompanied in chief of two mullets and in base of an ear of wheat, with leaves and stalked, all Or.

Boyetet
Azure, a chevron, accompanied in chief by three ill-ordered stars and in point of a casserole from which comes out smoke in two places which curves towards the chief in the form of re-entrant volutes, the whole of gold.

Boyot
Gules, with two accosted columns Or, each summed with a fleur-de-lis on the foot cut Argent, the whole accompanied by three stars of the second, rows in fess, alternating with the columns.