"Please join in our joy as we welcome Joseph Frederick Kushner, named after each of our paternal grandfathers, both master builders of their generation and inspiring patriarchs of their families," Donald Trump's daughter wrote on Tumblr today along with a photo of her cradling her newborn son.
Joseph, who arrived yesterday, is her second child with husband Jared Kushner. He joins 2-year-old sister Arabella Rose in the proverbial family trust.
Ivanka went on to pay homage to the aforementioned granddads, calling Jared's paterfamilias "a rock" whose "inindomitable spirit, his sense of family, and his work ethic are the values we hope to hand down to our son.
"My grandfather, Frederick," she continued, "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. Both men set the standards that have been passed down through the generations and which we hope to impart upon Joseph and Arabella.
"They created a legacy for our family that inspires our careers as well as our love and respect for one another. We are honored to name our son after these two distinguished men. We feel so blessed with the newest member of the family!"
The Celebrity Apprentice star also revealed that Arabella has been busy preparing for big sister duty.
"Arabella is at home with her grandmother practicing her swaddle before her little brother comes home!" the mother of two wrote on Instagram along with an adorable pic of the toddler cuddling a cozy-looking baby doll.
Trump and Kushner will be marking their fourth wedding anniversary on Oct. 25.
Joseph is also the sixth grandchild for Donald Trump, whose son Donald Trump Jr. has four kids.
"Congrats to @IvankaTrump & @JaredKushner on the birth of their baby boy last night," Don Jr. tweeted Tuesday. "Kai Donnie Tristan & Spencer can't wait to play w/ him."
Congratulations to the whole family!