1727, from French aubaine (12c.), of unknown origin, perhaps from Medieval Latin Albanus, but the sense is obscure. Klein suggests Frankish *alibanus, literally "belonging to another ban." A right of French kings, whereby they claimed the property of every non-naturalized stranger who died in their realm. Abolished 1819.
Examples from the Web for aubain
Madame Aubain resigned herself to the separation from her son because it was unavoidable.A Simple Soul