Christian, Rory, Kieran, Quinn, Shane, Dakota and Macaulay are siblings from which acting family?

In 1656 Christiaan Huygens improved clocks by adding what to them? Which Christian Dior fragrance with a deadly name was introduced in 1985? In 1659 Christiaan Huygens published a correct explanation of which planet's rings? Christian Nelson of Onawa, Iowa, created which chocolate-coated ice cream bar in 1921? Which Christian community is found principally in Egypt? King Christian X of which country rode his horse through the capital daily even after the Nazi invasion of 1940? Which Mexican painter wore a thorn necklace in a 1940 self-portrait that also features a hummingbird? Christina Aguilera, Lil' Kim, Mya and Pink topped the charts in 2001 with which song, a 1975 hit for LaBelle?