L&F Moreau were two brothers who were part of the Moreau dynasty of sculptors from Dijon France in the 19th century.  L&F Moreau were perhaps best known for creating highly ornate clocks and garniture sets in both bronze and spelter. The L stands for Louis Auguste (1855-1919), known for bronzes and metal sculptures. The F stands for Hippolyte Francois (1857-1930), a painter and sculptor.  Both of these men were each well-known artists and today are listed in the various important art guides (Davenports, Who's Who, etc.) and their work commands high prices and they have exceptional auction records -- their bronzes commonly bring upwards of $10,000.

They were nephews of Mathurin Moreau, who was perhaps better known and the family tree of this dynasty appears below. 

Their L&F Moreau studio was their business partnership which produced spelter copies of both of their bronze sculptures (spelter is a bronze-like Pot metal that is lighter weight than bronze and made primarily from zinc). It's important to note that L&F Moreau also individually produced bronze and spelter pieces and signed them Auguste and Hippolyte ... but those signed with L&F Moreau marks were produced by this partnership studio. There is much confusion about the Moreaus and many people think that these were more members of this impressive family than there were ... because of the way they used their middle names and initials!  Here is the family tree of this illustrious artistic family: