Viscounts Mersey (1916)
- John Charles Bigham, 1st Viscount Mersey (1840–1929)
- Charles Clive Bigham, 2nd Viscount Mersey (1872–1956)
- Edward Clive Bigham, 3rd Viscount Mersey (1906–1979)
- Richard Maurice Clive Bigham, 4th Viscount Mersey (1934–2006)
- Edward John Hallam Bigham, 5th Viscount Mersey (b. 1966)
The heir presumptive to the barony and viscountcy of Mersey is the present holder's uncle the Hon. David Edward Hugh Bigham (b. 1938)
The heiress presumptive to the lordship of Nairne is the present holder's daughter the Hon. Flora Diana Joan Bigham, Mistress of Nairne (b. 2003)
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