Brecon Beacons National Park has announced that it will use its Welsh language name only in future.
The switch - to Bannau Brycheiniog National Park - takes effect on Monday 17th April 2023, its 66th anniversary.
Park bosses say the name change will help celebrate and promote the area's culture and heritage.
It is part of a wider overhaul of how the park is managed, to try and address serious environmental challenges.
The Welsh name means "the peaks of Brychan's kingdom" and is pronounced ban-aye bruch-ay-nee-og, with the ch making the same sound as in loch.
Brycheiniog - named after 5th Century King Brychan - was an independent kingdom in the early middle ages, and its borders roughly match those of the national park today.