He was created Earl of Meath in the Peerage of Ireland in 1627, with remainder to his younger brother, the Hon.
His grandson, the fourth Earl, served as Lord-Lieutenant of Dublin and of Kildare.
He died childless and was succeeded by his younger brother, the seventh Earl.
As of 2014[update], the titles are held by the latter's grandson, the fifteenth Earl, who succeeded his father in 1998.
William Brabazon, of Tara House in County Meath, younger son of the seventh Earl, was the father of Barbara, who married John Moore.
Their grandson John Arthur Henry Moore assumed the additional surname of Brabazon and was the father of the aviation pioneer and Conservative politician John Moore-Brabazon, 1st Baron Brabazon of Tara.
The heir apparent is the present holder's only son, Anthony Jacques Brabazon, Lord Ardee (born 1977).