The king of Swaziland declared on the 50th anniversary that the country should be known as eSwatini (unsure if capitalization should remain in sentence starts)
Official website: http://www.gov.sz
But the tourist board's site, that is linked from the Government site, still uses "Swaziland": http://www.thekingdomofswaziland.com
For TC to consider whether the English name should be changed. Perhaps not "common usage" just yet.