French: occupational name for a gunmaker, a seller of guns, or the
keeper of an arsenal. The French word arsenal (Italian
arsenale) is from Arabic dar a?s-?sina?a
‘house of fabrication’, ‘workshop’. This spelling of the surname,
which is much more common in North America than in France, has been
assimilated to that of other French surnames ending in -ault,
for example Thibault.
Dictionary of American Family Names, Oxford University Press, ISBN 0-19-508137-4
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