Thomas Fitzwilliam
(see here),
born prob. 1465 ("came of age in 1486"),
of Dundrum, Bray, Baggotrath,
Merrion
and
Thorn Castle,
all in Co.Dublin [the castles of Merrion, Thorncastle and Dundrum included the lands of
Booterstown, Mount Merrion, Kilmacud, Ballinteer, Donnybrook, Ringsend, Irishtown and
Sandymount],
mar Eleanor Dowdall,
lived at Baggotrath,
died 1517 [Ball, vol.2, 1903], NOT 1529,
age prob. 52 yrs, having had issue:
Alison Fitzwilliam,
mar 1524 to Christopher Ussher
and had issue,
by this marriage Donnybrook (then only lands, no castle)
passed into the Ussher family,
though the Fitzwilliams retained the profitable mill of Donnybrook.
White Friars' Monastery, Aungier St, Dublin, was
dissolved shortly afterwards in 1539.