Thomas Blackroot

Thomas Blackroot was a gardener living in London in the nineteenth century. He was inducted into the Templar Order after surrounding Temple Church with beautiful roses, the secret behind which was the blood of his victims that enriched the soil.

His name was among the many given to Jacob and Evie Frye by Henry Green, which led to his death at the hands of the Assassins in the gardens he tended to.

Reference

 * Assassin's Creed: Syndicate