Ducatus Loediensis was dedicated to Peregrine Osborne, marquess of Carmarthen and heir apparent to the duke of Leeds, and to the mayor of Leeds and aldermen of Leeds. Peregrine Osborne, 2nd Duke of Leeds (1659 – 25 June 1729), styled Lord Osborne between 1673 and 1689, Earl of Danby between 1689 and 1694 and Marquess of Carmarthen between 1694 and 1712, was an English Tory politician.Dictionary of National Biography entry:http://www.oxforddnb.com/view/article/20879Other biography:http://en.wikipedia.org/wiki/Peregrine_Osborne,_2nd_Duke_of_LeedsRelationships:
Peregrine Osborne was a unspecified to Ralph Thoresby (1658-1725)