Troynovant
At some point prior to the collapse of the Multiverse, an unknown incarnation of Jenny Everywhere acquired a musical instrument known as a theriamen “on Troynovant” in the middle of an adventure. (PROSE: The Hermetic Garbage of Jenny Everywhere)
Behind the scenes
The name of Troynovant is, in the real world, often used as an alternative, archaic name for London, based on a spurious etymology of the name of the Iron Age British tribe the Trinovantes as deriving from the original name of the city having been “Troia Nova” or “New Troy”, thus feeding into an imaginary legendary history of England as having been founded by survivors of the fall of Troy just like the Roman Empire itself. However, how much of this background is applicable to the term's brief usage in The Hermetic Garbage of Jenny Everywhere is unclear, as the phrasing there implies that the Troynovant Jenny visited was a planet as opposed to a city.