The Killer brand of networking products has unveiled its latest adapter: one with a USB type C connector at one end and an RJ-45 jack rated for up to 2.5 gigabit Ethernet at the other. Rivet Networks asserts it is the world's first adapter designed for competitve gaming or other high-performance PC tasks in mind.
https://www.notebookcheck.net/Rivet-Networks-announces-the-new-Killer-USB-type-C-3-1-Adapter-to-2-5-Gigabit-Ethernet-adapter.495022.0.html