https://www.theregister.co.uk/2018/10/04/wifi_80211_spec/

Wi-Fi, known for about two decades by its wonky Institute of Electrical and Electronics Engineers designation, IEEE 802.11, has adopted a new consumer-oriented naming scheme.

The latest version of the specification, 802.11ax, has been renamed Wi-Fi 6 by the Wi-Fi Alliance, the Austin, Texas-based trade association responsible for overseeing Wi-Fi technology branding and product certification.