Not sure if this actually helps but my ggg grandfather was Thomas Ell born Shoreditch 1818, he married Louisa Robon also born 1818 Shoreditch. His son was Alfred James Ell b St Lukes who maried Emily Bugden. They had a son Vivian Leslie. The Ell's anecdotally (according to my grandfather) were descended from the French aristocracy!! There is no proof of that at all! Robon however does suggest a French connection. Robon does appear as a middle name of another Thomas Ell - born 1891 d 1891 (son of Edward Adolphus and Hannah Sophia Parkes)