Wikipedia
Koopalings
The (also known as in Japan and Europe) or in Japan) are a group of seven fictional, childlike characters in the Mario video game franchise by Nintendo. Their individual names are Iggy, Larry, Lemmy, Ludwig, Morton, Roy, and Wendy. Originally depicted as the children of the series antagonist Bowser, they first appeared as boss characters in the 1988 game Super Mario Bros. 3. They have since appeared in subsequent Super Mario games and spin-off Mario titles.
They have made several appearances in other media, most notably in the cartoon The Adventures of Super Mario Bros. 3, which featured entirely different names for the Koopalings due to them not having official names at the time of its production phase.