Earl of Cumberland explained

The title of Earl of Cumberland was created in the Peerage of England in 1525 for the 11th Baron de Clifford.^[1] It became extinct in 1643.^[1] The dukedom of Cumberland was created the following year.

The subsidiary title of the first three earls was Baron de Clifford. The last earl was created Baron Clifford before he became earl, in 1628.^[1]

Earls of Cumberland (1525)

• Henry Clifford, 1st Earl of Cumberland (1493–1542)
• Henry Clifford, 2nd Earl of Cumberland (1517–1570)
• George Clifford, 3rd Earl of Cumberland (1558–1605)
• Francis Clifford, 4th Earl of Cumberland (1559–1641)
• Henry Clifford, 5th Earl of Cumberland (1591–1643)

References

1. Oxford Dictionary of National Biography, Oxford University Press, 2004.