It is always a bit of a mystery what new codenames will become for GPUs, CPUs and thus case APUs. Komachi Ensaka on his twitter account posted an interesting name for future APUs.

NVIDIA makes use of famous mathematicians, AMD tends to sick to painting artists for APIs. There are several names active on the APUs right now I mean you know Matisse 14nm and Picasso 12nm. We've also seen artist names like Vermeer and Renoir that could end up in the 3000 APUs with ZEN2 design. As suggested the generation hereafter would be Cézanne for 7nm+ and even another name is present, of course Rembrandt, at 5 nanometers.

Back to Cézanne though, it would be a 7nm+ design and thus is based on ZEN3. Post-Impressionist French painter Paul Cézanne is best known for his varied painting style, which greatly influenced 20th-century abstract art.

Next generation APUs from AMD will be code-named Cézanne