Westenra is an Irish surname, derived from the Dutch van Wassenaer.Burke's Peerage, 1931 edition, p. 2036. Notable people with the surname include:
Derrick Westenra, 5th Baron Rossmore (1853–1921), Irish soldier and author Hayley Westenra (born 1987), New Zealand soprano Henry Westenra, 3rd Baron Rossmore (1792–1860), Irish Member of Parliament and peer Henry Westenra (1742–1801), Irish Member of Parliament for Monaghan Henry Westenra, 4th Baron Rossmore (1851–1874), Irish soldier and peer John Westenra (1798–1874), Irish Member of Parliament for King's County Peter Westenra (died 1693), Irish Member of Parliament for Athboy Warner Westenra (1706–1772), Irish Member of Parliament for Maryborough Warner Westenra, 2nd Baron Rossmore (1765–1842), Irish landowner and politician
Fictional people: Lucy Westenra, a character in the 1897 novel Dracula
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