[1] In 1794 he married Dorcas Spread of Ballycannon, County Cork; they had three sons and five daughters.
[1] In 1821 Grady's daughter Amelia married Edward Chichester, Dean of Raphoe, who in 1871 succeeded as Marquess of Donegall.
In 1799, he wrote, "I suffer much in my expectations because, if I pursue my profession, I must remain in this country, and it is idle to say that an individual here, however industrious or intelligent as a barrister, unknown to the British minister in the Imperial Parliament, can expect that situation of which, as a member of the Irish parliament, time, zeal and fitness for judicial situation acquired at least through practice, might induce a reasonable hope...."[1] In the general election of 1801, Grady was elected to the new Limerick City constituency in the UK Parliament.
[1] For his support of the Union, Dublin Castle appointed him second counsel to the revenue board, with an annual salary of £1,200.
[1] Disappointed in not having been better remunerated for his Unionism, Grady supported opposition candidates in the general elections of 1812 and 1818.