Definitely not. Luther is a work of fiction. The creators crafted the story and its elements to provide viewers with an exciting and thrilling viewing experience that doesn't have a basis in reality.
I'm not sure who Tobias Jones specifically is in this story without more context. It could be an ordinary person with a unique experience, or perhaps a character created for a specific fictional or non - fictional narrative.
There's no way to tell exactly who Jones is without more details. He could be a soldier, a civilian, or someone with a special role during the civil war.
In the Davy Jones story, Davy Jones was a sort of malevolent spirit of the ocean. He was associated with the deep sea and the fate of sailors. Sailors believed that if they died at sea, their souls would be claimed by Davy Jones. He was a powerful and somewhat mysterious figure in nautical mythology, with his 'locker' being a place where sunken ships and the souls of drowned sailors were thought to reside.