David Hunter Mervyn was a 19th-century Member of Parliament in the Otago region of New Zealand.
He represented the Manuherikia electorate from 1867 to 1870 through winning the by-election on 15 May, and then the Mount Ida electorate from 1871 (having won the 17 February general election) to 1875, when he retired.
References
David Mervyn Wikipedia(Text) CC BY-SA