Rovin

The Rovin was a French automobile manufactured from 1946 until 1951. Built by a racing driver and motorcycle maker, a M. De Rovin, these were small cars with single-cylinder 260cc engines and flat-twins of 425cc; these latter were later enlarged to 462cc. The cars sold well, mainly in Paris.

Reference
David Burgess Wise, The New Illustrated Encyclopedia of Automobiles.