How many kids do Jon and Kate Gosselin have? Jon and Kate Gosselin have 8 children. Their names are Cara, Madelyn Mady, Leah, Alexis, Hannah, Joel, Collin, and Aaden. Mady and Cara are twins, and the others are sextupl…ets.   Jon Gosselin Born April 1, 1977 Dad Jon does his best to keep up with his high-energy family.