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By Randee Dawn

Kourtney Kardashian and Scott Disick have given the newest addition to their family a name fit for a king.

As the reality TV star posted on Instagram Sunday (along with a picture of the little one's hand), "Madly in love with my little Reign Aston Disick."

Reign was born on Dec. 14, which was the fifth birthday of the couple's eldest child, Mason. Kardashian and Disick also have a 2-year-old daughter, Penelope.

Well, now we know who officially rules the household!

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