3825. William de Ros. Born ca 1223 in Wark upon Tweed, Northumberland. William died in 1266 in Wark upon Tweed, Northumberland.
ca 1241 William married Christian Bertram, daughter of Sir Roger Bertram (ca 1184-May 1242) & Agnes (-aft 7 May 1256). Born ca 1219 in Midford, Northumberland.