Brouhaha-Nine-Nine-Five was a galaxy. It was the location of Buchan Industries and the Ever-and-Ever Prolixity. (AUDIO: The Lamentation Cipher, The Viyran Solution)
The Thirteenth Doctor ended up in the galaxy when a malfunction in the TARDIS caused her to go there instead of the Silfrax Galaxy. (PROSE: The Runaway TARDIS)