Nom de famille "Petty Fitz Maurice"
William (1765 - 1809), marquis de Lansdowne
Petty Fitz Maurice
- Henry (1780 - 1863), Marquess of Lansdowne, chancellor of the Exchequer, lord president of the Council ✕ (1808) Louisa Emma Fox Strangways (1785 - 1851), lady of the Bedchamber
- Henry (1816 - 1866), Marquess of Lansdowne, member of parliament ✕ (1840) Georgiana Herbert (1817 - 1841)
- = Henry ✕ (1843) Emily de Flahault (Emily Jane Mercer) (1819 - 1895), Baroness Nairne
- Henri Petty-Fitz-Maurice (Henry Charles Keith) (1845 - 1927), secrétaire d'État à la Guerre ✕ (1869) Maud Evelyn Hamilton (1850 - 1932), dame d'atours de la reine alexandra
Evelyn Emily Mary Petty-Fitzmaurice (1870 - 1960) ✕ (1892) Victor Cavendish (Victor Christian William) (1868 - 1938), Duke of Devonshire, privy counsellor, secretary of State for the Colonies
- Edmund George (1846 - 1935)
- Emily (Emily Louisa Anne) (1855 - 1939) ✕ (1886) Everard Charles Digby (1852 - 1915)
Petty-Fitzmaurice
- William Thomas (1811 - 1836) ✕ (1834) Augusta Lavinia Priscilla Ponsonby (1814 - 1904)
- Mary ( - 1927) ✕ (1860) Percy Egerton Herbert (1822 - 1876)
Petty-FitzMaurice
- Beatrix (1877 - 1953) ✕ (1918) Osborne de Vere Beauclerk (1874 - 1964), Duke of St. Albans
Petty-FitzMaurice
- Mary Margaret Elizabeth (1910 - 2003) ✕ (1931) Ririd Myddelton (1902 - 1988)
Petty-Fitzmaurice
Fitz Maurice
1 — Elisabeth ✕ Brian Hay ( - 1428), connétable du château de Mac-Kenigan 1373
Petty-FitzMaurice
1 — Beatrix (1877 - 1953) ✕ (1918) Osborne de Vere Beauclerk (1874 - 1964), Duke of St. Albans
Petty-Fitzmaurice
1 — Edmund George (1846 - 1935)
Petty-FitzMaurice
1 — Emily (Emily Louisa Anne) (1855 - 1939) ✕ (1886) Everard Charles Digby (1852 - 1915)
Petty-Fitzmaurice
1 — Evelyn Emily Mary (1870 - 1960) ✕ (1892) Victor Cavendish (Victor Christian William) (1868 - 1938), Duke of Devonshire, privy counsellor, secretary of State for the Colonies
Petty-Fitz-Maurice
1 — Henri (Henry Charles Keith) (1845 - 1927), secrétaire d'État à la Guerre ✕ (1869) Maud Evelyn Hamilton (1850 - 1932), dame d'atours de la reine alexandra
Petty-FitzMaurice
1 — Henry (1816 - 1866), Marquess of Lansdowne, member of parliament ✕ (1840) Georgiana Herbert (1817 - 1841) ✕ (1843) Emily de Flahault (Emily Jane Mercer) (1819 - 1895), Baroness Nairne
Petty-Fitzmaurice
1 — Henry (1780 - 1863), Marquess of Lansdowne, chancellor of the Exchequer, lord president of the Council ✕ (1808) Louisa Emma Fox Strangways (1785 - 1851), lady of the Bedchamber
Petty-FitzMaurice
1 — Mary ( - 1927) ✕ (1860) Percy Egerton Herbert (1822 - 1876)
Petty-Fitzmaurice
1 — Mary Margaret Elizabeth (1910 - 2003) ✕ (1931) Ririd Myddelton (1902 - 1988)
Petty Fitz Maurice
1 — William (1765 - 1809), marquis de Lansdowne
Petty-FitzMaurice
1 — William Thomas (1811 - 1836) ✕ (1834) Augusta Lavinia Priscilla Ponsonby (1814 - 1904)