Romilly was a younger son of Sir Samuel Romilly and Anne, daughter of Francis Garbett, of Knill Court, Herefordshire. Lord Romilly was his elder brother. In 1836 he played one first class match for MCC against Cambridge University in which he scored one run in each innings.
Romilly married Lady Elizabeth Amelia Jane, daughter of Gilbert Elliot-Murray-Kynynmound, 2nd Earl of Minto, in 1848. He died at Westminster in April 1887, aged 77. Lady Elizabeth died in January 1892.
- Hansard 1803–2005: contributions in Parliament by Frederick Romilly
|Parliament of the United Kingdom|
Hon. George Smythe
Lord Albert Denison
|Member of Parliament for Canterbury
1850 – 1852
With: Hon. George Smythe
Henry Plumptre Gipps
Hon. Henry Butler-Johnstone