William Pakenham
William Pakenham is the name of the following people:
- William Pakenham, 4th Earl of Longford ( William Lygon Pakenham ; 1819–1887), British-Irish nobleman and general
- William Pakenham (Admiral) (1861–1933) British Admiral
- William Sandford Pakenham-Walsh (1868–1960), British-Irish clergyman, missionary and author