Whelohff family
The Whelohff family appears in The Sims 3: Ambitions, and lives in the town of Twinbrook, which is included in that expansion pack. The family includes Rich, Rosy and Zo. So far, very little is known about them, but it is generally believed that Zo Whelohff is Zo Curious as a child.
Their family name is a pun on "well off", as in rich or wealthy. Each of their names is a pun as well, such as "rich, well off", "whoa, she's well off" and "so well off".
Onomatology
Whelohff- a pun on Well of
Zo- a pun on so
Rich- to have lots of money