2005: As soon as Britney Spears found out that she’s having a baby boy, she decided to name her unborn son, Kevin Spears Federline! Britney wanted to name the baby after her husband, Kevin Federline but insisted that Spears be the middle name. “Britney hasn’t taken Kevin’s last name, so she wanted their baby to have both names,” her pal reveals. While it’s a woman’s prerogative to change her mind, Britney’s pal says that she’s so sold on the name she’s already had KSF monogrammed on baby blankets etc.