| Honorific Prefix: | The Right Honourable |
| The Earl of Seafield | |
| Birth Date: | 9 March 1847 |
| Birth Place: | Kilmallock, County Limerick, Ireland |
| Death Place: | Oamaru, New Zealand |
| Resting Place: | Oamaru Old Cemetery |
| Tenure: | 5 June – 3 December 1888 |
| Other Titles: | 2nd Baron Strathspey 14th Baronet Colquhoun |
| Predecessor: | James Ogilvie-Grant |
| Successor: | James Ogilvie-Grant |
| Issue: | 7, including James and Trevor |
| Parents: | James Ogilvie-Grant, 9th Earl of Seafield Caroline Evans |
Francis William Ogilvie-Grant, 10th Earl of Seafield (9 March 1847 – 3 December 1888), styled Viscount Reidhaven from 1884 to 1888, was a Scottish peer who emigrated to New Zealand.
Seafield was born on 9 March 1847 in Kilmallock, County Limerick, Ireland.[1] He was the eldest son of James Ogilvie-Grant, 9th Earl of Seafield by his first wife, Caroline Louisa Evans (1820–1850), daughter of Eyre Evans, Esq. of Ash Hill, and Anna Maunsell.[2] After his education at Harrow, he served as a midshipman in the Royal Navy and then joined the merchant navy.
Seafield (then simply known as Frank Grant) arrived in New Zealand in 1870.[3] He bought a farm in the Waiareka Valley in a locality known as Te Aneraki[4] to the west of Oamaru in North Otago. He lost his money through his farming pursuits, and from the late 1870s worked as a labourer in fencing or other available tasks. Some time after the marriage, the impoverished family moved to Oamaru.
He stood twice for election in the electorate to the New Zealand House of Representatives. The first time, he contested the against the incumbent, Samuel Shrimski. When Shrimski was appointed to the Legislative Council in 1885, Grant contested the resulting, but lost against Thomas Hislop.
In 1884 his cousin, Ian Ogilvie-Grant, 8th Earl of Seafield, died, and the title devolved to the former's uncle, Francis' father. As the heir apparent to the earldom, Grant unexpectedly became Viscount Reidhaven. When his father died on 5 June 1888, he became the Earl of Seafield in the Peerage of Scotland. A subsidiary title was Baron Strathspey in the Peerage of the United Kingdom.
Seafield died on 3 December 1888 from a heart condition. He is buried at the Oamaru Old Cemetery.[5] He was succeeded by his oldest son in the earldom, James Ogilvie-Grant, 11th Earl of Seafield, who at the time was twelve years old. He was fatally wounded in World War I in 1915, and was succeeded in the barony of Strathspey, the baronetcy of Colquhoun and as Chief of Clan Grant by his younger brother Hon. Trevor Ogilvie-Grant.[6] The earldom and the other subsidiary Scottish peerages could be passed on to female heirs, and were inherited by Nina Ogilvie-Grant, 12th Countess of Seafield.
After Lord Seafield died, his wife lived for some time in Auckland and Tauranga before moving to England.[7] [8] She died at Brighton on 16 October 1935.
On 24 November 1874, Seafield married his first cousin Ann Trevor Corry ('Nina') Evans, daughter of Major George Thomas Evans and Louisa Barbara Corry. They had seven children: