(Image Credit: @ivankatrump/Twitter)

The newest Trump has a name.

Following grandpa Donald Trump's news that his daughter welcomed a new baby boy Oct. 14, Ivanka Trump officially introduced baby Joseph to the world Tuesday.

"With love we welcome our son, Joseph Frederick Kushner," she tweeted.

The boy will take father Jared Kushner's last name.

The mother of two posted pictures on her Tumblr page and the word adorable would be an understatement. One picture has big sister Arabella, 2, holding her new little brother and the other is of a glowing Ivanka holding her new son right after giving birth.

Ivanka Trump and Husband Welcome Baby Boy

Trump, 31, continued on her Tumblr to explain the name Joseph and its origin.

"Joseph Frederick Kushner, named after each of our paternal grandfathers, both master builders of their generation and inspiring patriarchs of their families," she explained.

She continued, "Jared's grandfather, Joseph, was a rock. His indomitable spirit, his sense of family, and his work ethic are the values we hope to hand down to our son. My grandfather, Frederick, was a builder not just of tens of thousands of homes throughout this city, but of a tight-knit family that honors to this day the traditions he established."

Baby Joseph Frederick joins Arabella, who was born two years ago, after Ivanka Trump and Jared Kushner, 32, were married in 2009.