Although normally the singular includes the plural...
... and vice versa, it does not apply in this case: I am not, as far as I know, related to South Dakota Governor Mike Rounds. He is presumably from the distant Latvian, Flemish or gangsta branches of my clan. This guy, on the other hand, is either the assistant editor of Moonraker, Superman II and Krull or else, IIRC (Google's no help) a British writer on military news for Jane's Defence Weekly:
The Republican Governor of South Dakota in the United States [*] has signed a bill which would make it a crime to perform an abortion unless the mother's life is in danger.... Governor Mike Round issued a statement in which he said, "the true test of a civilisation is how well people treat the most vulnerable"... - John Shovelan, "US state tightens abortion law", ABC News (Tuesday 7 March 2006, 8:13am AEDT)Look, Media Watch, it's a typo! Go pounce on it!
[*] That's as distinct from the South Dakota in the Carpathians, and the South Dakota in the Nile Delta.
PS: Uggh. There's a Spanish branch of the family, it seems, and unfortunately it's represented by this character.