That'd be great if you think it could work! Well, here's the concept I've gotten so far. If you like it, maybe I'll work it up to a full profile:

[i]Sebastian Francis Brotherton III is the last Lord Brotherton, of the Wakefield Brothertons. The male side of his family was quite drastically cut away by the Great War; four sons left for France and only Sebastian returned - after a prolonged stay in a French military hospital and even then he was halfway a cripple. While he convalesced and gathered what little strength he had left, finally back at the family estate, his aging parents passed of natural causes. With his own health very weak, Sebastian does not expect to last long enough to marry and have an heir of his own - and, well, he was never that way inclined at the best of times. So he began doing some research into the family history to discover to whom things should go when he passed. He discovered that a branch of the Brotherton family did indeed survive - in Massachussets, America. When he dies, everything goes to them by law. He has shuttered the estate, gathered the valuables, dismissed the staff and set out to America to make contact with the Arkham [possibly Innsmouth? Kingsport?] Brothertons. He fully intends to die in America, and have a good time doing it - as far as what's left of him is capable of having a good time.[/i]

Tl;dr a sickly English heir with ABSOLUTELY NO DARK FAMILY SECRET AT ALL NO SIR.