Launceston, in the County of Cornwall (Viscountcy)
A peerage of the United Kingdom.
Letters patent issued on Wed 18th Jul 1917
To Alexander Albert Mountbatten as Hereditary peerage.
|Number||Surname||Forenames||Held from||Held to|
|1st||Mountbatten||Alexander Albert||Wed 18th Jul 1917||Tue 23rd Feb 1960|
Peerage extinct on Tue 23rd Feb 1960 with the 1st holder .