Koa, which means "warrior" or "brave one," was born on January 17, 2021.
Andi introduced Koa in her Instagram account on January 19. She said, "And just like that, my heart has grown even bigger once more."
Philmar also posted a photo of his son on Instagram. The surfer is thrilled to have another boy to help him "love and take care of their girls."
He has two more sons from previous relationships. There's Toro, who lives with him in Siargao, and Kanoa, who lives with the mother in France.
Andi Eigenmann: mother of three
The actress first dedicated a post to nine-year-old Ellie, thanking her for the gift of motherhood.
With Ellie on the cusp of adolescence, Andi knows how different things are going to be moving forward. She can also see how independent her firstborn has become.
But even though Ellie is learning more and more how to stand on her own, Andi is certain that their bond is going to grow even stronger.
The celebrity mom wrote: "She may not need me the same way Lilo and baby 3 would, but she does and still will in different ways. And I have made it a promise to do my best and make sure to thrive in fulfilling these needs because that is what I am here for.
"This is something I have and will always be willing to do, since the moment I chose to have you."
When it came to Lilo, Andi assured her one-year-old island girl that her love for her would not wane with the arrival of the third baby.
She said, "The middle child, they say, usually gets the least attention growing up, I don't think that's possible when the middle child is someone like you...
"I will always have overflowing love to give to you, don't you worry because that's the magic of being a mother. And It's specially easy when the one to love is such a little big ray of sunshine—YOU!"