A sketch of the male descendants of Josceline de Louvaine, the second house of Percy, earls of Northumberland, barons Percy, &c

Ancestry.com. A sketch of the male descendants of Josceline de Louvaine, the second house of Percy, earls of Northumberland, barons Percy, &c [database on-line]. Provo, UT: Ancestry.com Operations Inc, 2005.Original data: Surtees, William Edward.. A sketch of the male descendants of Josceline de Louvaine, the second house of Percy, earls of Northumberland, barons Percy, &c. : and territorial lords of Alnwick, Warkworth, and Prudhoe Castles, in the county of Northumberland. Newcastle-upon-Tyne: M.A. Richardson, 1844.