Henry I. to the Constableship of Pembroke Castle and other important
offices. He married Nesta, daughter of Rhys ap Gruffyd, ap Tudor
Mawr, Prince of South Wales, and had issue by her, three sons, the
eldest of whom was

IV. MAURICE FITZ GERALD, or son of Gerald. This, it will be noticed,
was the first Fitzgerald of which we have any record, and he was the
progenitor of the Irish Fitzgeralds. He accompanied Richard de Clare,
Earl of Pembroke, popularly known as "Strongbow," to Ireland, and there
highly distinguished himself, having, among other acts of renown,
captured the city of Dublin. He died at Wexford in 1177. He married
Alice or Alicia, daughter of Arnulph de Montgomery, fourth son of
Roger de Montgomery, who led the centre of the Norman army at the
battle of Hastings, and by her had issue - five sons, the eldest
of whom was William, Baron of Naas, not Gerald as claimed by the
supporters of the Colin Fitzgerald theory.

Thus far the two genealogies may be said to agree, except in a few
of the marriages.

V. GERALD FITZ MAURICE, the second son, in 1205 became first
Baron Offaly. The third son, Thomas, was progenitor of the original
Earls of Desmond, who have long been extinct in the male line, the
present Earldom, which is the Irish title of the Earl of Denbigh,
having been created in 1622. Gerald Fitz Maurice married Katherine,
daughter of Hamo de Valois, who was Lord Chief Justice of Ireland
in 1197, and by her had a son,

VI. MAURICE FITZ GERALD, second Baron Offaly, one of the Lord
Justices of Ireland. Maurice died in 1257, having married Juliana,