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| | | | | | | | | | | | | | | | John Howe |
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| | | | Howe baronets of Compton | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | Sir John Howe 1st Baronet died 1671 | | | | | | | | | | | | | | | | | | | | | | George Howe died 1647 |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Howe baronets of Cold Barwick |
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| | | | Sir Richard Howe 2nd Baronet 1621–1703 | | John Grobham Howe 1625–1679 | | | | | | | | | | | | | | | | | | Sir George Howe 1st Baronet c. 1627 – 1676 |
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| | | | | | | | | Baron Glenawley Viscount Howe (Ire, 1701) | | | | | | | | | | | | | | | | | | | | | | | |
| | | | Sir Richard Howe 3rd Baronet c. 1651 – 1730 | | Scrope Howe 1st Viscount Howe 1648–1713 | | | | | | John Grubham Howe 1657–1722 | | Charles Howe 1661–1742 | | Lt.Gen. Emanuel Howe c. 1663 – 1709 | | Sir James Howe 2nd Baronet c. 1669 – 1736 |
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| | | | | | | | | | | | | | | | | | Baron Chedworth | | | | | | | | | |
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| | | | John Howe died young | | Emanuel Howe 2nd Viscount Howe 4th Baronet c. 1700 – 1735 | | | | | | John Howe 1st Baron Chedworth died 1742 | | Three sons who died young | | Three sons without male issue |
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| | | | | | | | | Viscount Howe (GB, 1782) | | | | | | | | | | | | | | | | | | | |
Baron Curzon Viscount Curzon | | | | | | | Baron Howe Earl Howe (GB, 1788) | | | | | | | | | | | | | | | | | | | |
Assheton Curzon 1st Viscount Curzon 1st Baron Curzon 1730–1820 | | George Howe 3rd Viscount Howe 5th Baronet c. 1725 – 1758 | | Richard Howe 1st Earl Howe 4th Viscount Howe 1st Baron Howe 1726–1799 | | William Howe 5th Viscount Howe 5th Baron Glenawley 7th Baronet 1729–1814 | | John Howe 2nd Baron Chedworth 1714–1762 | | Henry Howe 3rd Baron Chedworth 1716–1781 | | Hon. Thomas Howe died 1776 |
| | | | | | | | | Earldom and GB viscountcy extinct | | Viscountcy, barony and baronetcy extinct
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Hon. Penn Curzon 1757–1797 | | | | | | Sophia Waller 2nd Baroness Howe (née Howe) 1762–1835 | | | | | | | | | | | | | | John Howe 4th Baron Chedworth 1754–1804 |
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| | | | | | | | | | | | | | | | | | | | | | | | | Barony extinct |
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| | | | | | | | | | Earl Howe (UK, 1821) |
George Howe 1788–1805 | | Leicester Howe 1792–1793 | | Richard Curzon-Howe 1st Earl Howe 2nd Viscount Curzon 2nd Baron Curzon 3rd Baron Howe 1796–1870 |
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| | | | | | | | George Curzon-Howe 2nd Earl Howe 1821–1876 | | Richard Curzon-Howe 3rd Earl Howe 1822–1900 |
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| | | | | | | | | | | | Richard Curzon 4th Earl Howe 1861–1929 | | Hon. Frederick Curzon 1868–1920 |
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| | | | | | | | | | | | Francis Curzon 5th Earl Howe 1884–1964 | | Cdr. George Curzon 1898–1976 |
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| | | | | | | | | | | | Edward Curzon 6th Earl Howe 1908–1984 | | Frederick Curzon 7th Earl Howe born 1951 |
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| | | | | | | | | | | | | | | | Thomas Curzon Viscount Curzon born 1994 |