October 16, 2014 05:45 PM

Delbarr Moradi

Randi Zuckerberg couldn’t be happier about her baby boy.

The children’s book author and founder/CEO of Zuckerberg Media gave birth to son Simcha “Simi” Tworetsky on Friday, Oct. 10, naming him after the Hebrew word for “joy.”

“I have a house full of boys, and couldn’t be happier!” Zuckerberg, 32, tells PEOPLE. “Baby Simi is already living up to his namesake, bringing so much joy to our family. We are in love and so thankful for this new addition.”

Simi was born in Palo Alto, California, weighing in at 6 lbs. and measuring 18 inches long. He joins big brother Asher, 3.

Both kids are sure to be tech-savvy: Their mom hosts Dot Complicated on SiriusXM and her picture book, Dot, is all about a little girl skilled with electronic devices, while dad Brent Tworetzky is an executive at online learning company Udacity. Oh, and uncle Mark Zuckerberg founded a little website called Facebook.

Delbarr Moradi

— Michele Corriston 

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