The Hon Louisa Lelias Plunket was born on 7 November 1833, the daughter of John Span Plunket, 3rd Baron Plunket of Newton (1793-1871) and Charlotte Bushe, daughter of the Right Hon. Charles Kendal Bushe, Lord Chief of the Court of King's Bench in Ireland. Her siblings were: william Conyngham Plunket, 4th Baron Plunket and Archbishop of Dublin; Charles Bushe Plunket (1830-1880); David Robert Plunket, 1st Baron Rathmore; Hon. Arthur Cecil Crampton Plunket (1845-1884); Patrick Henry Coghill Plunket (b. 1845); Anna Plunket (d. 1884); Katherine Frances Coghill (d. 1881); Hon. Charlotte Plunket (d. 1878); Emily Mary Plunket; Selina Maria Plunket; Josephine Alice Plunket; Isabella Katherine Plunket.
On 27 July 1852 she married Richard Jonas Greene, son of the Right Hon. Richard Wilson Greene, Baron of the Exchequer in Ireland, and Elizabeth Wilson. Their children being: Charlotte Selina Franks (1853-1883), The Right Hon Sir william Conyngham Greene (1854-1934), Elizabeth Alice Greene; Charles Kendal Greene; Prof. Harry Plunket Greene (1865-1936) and Geoffrey Philip Greene (1868-1930).
Louisa Lelias Plunket Greene died on 30 March 1891 in Dublin, Ireland.
