Hi Norma, I know of a line of DONAIS (Delaunay would be just one of the variations) in which John Baptise DONAIS married an Aurelie Beaudreau probably abt. 1810; if they had a dau. & named her Aurelie, it would fit with this timeline. If you're interested in checking it out, do a search for Jean Baptiste Donais Desnoyers dit Freniere & Marie-Archange Arceneau. There's lots of info online about this family. Their second child was the John Baptiste above.
ALSO, please check out my recent post on DELAUNAY, and see if you think there might be any connection.