Timeless Child's realm

In an account which claimed to have discovered in the Matrix, the Timeless Child, who would become the Time Lord known as the Doctor, hailed from a realm which was potentially within a separate dimension or universe from N-Space.

The child, the only known member of their species, was found on an unknown planet, near a monument beneath a wormhole (TV: The Timeless Children) to "another, unknown dimension". (PROSE: The Secrets of the Timeless Child) This was later confirmed by Tecteun to in fact be Universe Two, who theorised that the universe may possibly be home to the Timeless Child's realm, although the Thirteenth Doctor was not so sure if that was the case. (TV: Survivors of the Flux)

Ultimately, the child was found and taken to Gallifrey by the Shobogan Tecteun, though their true place of origin remained unconfirmed. (TV: The Timeless Children)