https://wccftech.com/amd-next-generation-vermeer-processors-to-be-called-ryzen-5000-series/

According to a leak by an unknown source (via Videocardz), AMD will be utilizing 5000 series naming instead of 4000 series naming for its upcoming Zen-3 based Vermeer series of processors. This is something that makes a lot of sense considering AMD already has Ryzen 4000 series on mobility (Renoir) and OEM desktop (also Renoir) so marketing Vermeer as 4000 as well would just be bad marketing. It would be much better to align both the next generation Desktop and Mobility parts under the 5000 Series banner.

The leaker also states that the OPN part numbers we already know may actually max out at 12 cores instead of the 16 previously leaked by Igor. Since this is the first time we are hearing from this source this is clearly rumor territory and has been marked as such.