Island of Barbelo
From Jenny Everywhere Wiki
The Island of Barbelo was a “secret interdimensional island” of which there existed an infinity of variations in the Multiverse. Each was the childhood home of a version of Jenny Everywhere, specifically the versions who grew up as the daughters of versions of Amelia Midnight, as the island was where Midnight took those she wished to protect from her many enemies. In some incarnations, Jenny would begin her travels after one of Amelia's enemies found and destroyed Barbelo, while in others, she would simply leave of her own accord to explore the outside world. (PROSE: The Hermetic Garbage of Jenny Everywhere)