https://wccftech.com/microsoft-windows-10-vanadium-vibranium/

We reported earlier this year that Microsoft is dropping the “Redstone” codename for Windows 10 feature updates. Windows 10 October 2018 Update was the last one to carry that title with the upcoming version of Windows 10 being given the codename 19H1, hinting that the version will be released in the first half of 2019.

While that naming convention looks pretty straightforward and goes with the naming strategy employed by the company for Windows 10 names for the public, it appears Microsoft is considering yet another naming scheme.