The singer-turned-fashion designer is expecting her fourth child in July - a much-longed for girl - and she and her soccer star husband David have decided to give the 'Desperate Housewives' actress an important role in the tot's life.
A friend of the couple - who already have sons Brooklyn, 12, Romeo, eight, and six-year-old Cruz, together - told The Sun newspaper: "Victoria ran it past David and they both want Eva. She's extremely honoured."
Victoria and Eva became close friends after the former Spice Girl moved to Los Angeles in 2007 following David's move to the Los Galaxy soccer team.
The star-studded event took place at the Petit L'Ermitage hotel in West Hollywood and Eva ensured the venue was decorated with pink tablecloths, flowers and chairs.
Victoria tweeted after the party: "Such a lovely day!!!thank u so much @EvaLongoria and @KenPaves for being such wonderful friends.Baby showers are so much fun!!!!!!!x vb (sic)"