In some cases, librarians add fanout (pin escapes) to their library symbols to save time during layout and to have a more consistent component fanout in all locations.
My opinion is that the RF stands for Reflow (as the Reflow SMD Pads are sometimes different than the SMD Pads for the Wave solder process) and the WV stands for With Vias.
I have worked with several companies that had a very specific naming convention to identify footprints in the library and it is not uncommon to have different footprints based on the soldering process, spec build to IPC, MIL, etc. or different footprints with and without fanout. It is sometimes recommended to fanout off the side of discrete components (at the heel of the pads) vs fanout out the far edges (at the toe of the pads) as the electrical path to the metallization of the discrete component is closer when you fanout from the side which in turn makes the connection to the internal planes that much shorter.
My two cents,