Hello Nita:
You will want to look to Burke's Peerage. Either in book form at your library, or online. The LDS Family History Center nearest you can let you know if they have filmed Burkes Peerage, should the tomes not be availiable via your library. I suspect they have been microfilmed and you could request a copy to be sent to your local FHC.
Yours Aye,
Lauren Boyd