Teskhamen is an ancient vampire who served in Akasha's cult of blood gods for a thousand years. He was known as the God of the Grove and served in a shrine in northern France until approximately 10 AD. Having been horrifically burnt when the Elder left Akasha and Enkil in the sun, he instructed his followers to bring him a man of learning that he might pass on his powers to. He planned for this new fledgling to travel to Egypt and discover what had truly happened to Akasha and Enkil, and Marius de Romanus was kidnapped for this purpose and brought before him after several months of imprisonment.
Initially, Marius believes the God of the Grove was destroyed by the Druids, but in Prince Lestat it is revealed that he survived with the assistance of a healer woman named Hesketh. After recovering and turning Hesketh into his vampire companion, she and Teskhamen became two of the founders of the Order of the Talamasca along with Gremt Stryker Knollys.