John GrenhamJohn Grenham is the author of Tracing your Irish Ancestors (Gill & Macmillan, 3rd ed.2006), the standard guide for Irish genealogy, Clans and Families of Ireland (1995), and An Illustrated History of Ireland (1997), among other works. He has written the "Irish Roots" column in The Irish Times since February 2009, develops heritage databases, and runs the Irish Ancestors website in conjunction with The Irish Times. Read More Read Less