Now that Nicole Kidman has finally achieved her life's goal and given birth to a baby, we can all concentrate on why she gave it such a crappy name.

And actually it seems like there's quite a simple answer – Nicole Kidman decided to name her new daughter Sunday Rose because she really, really hates Scientology. Apparently.

You see, Nicole Kidman is a Catholic and Sundays are important to Catholics, but not important to Scientologists, and she used to be a Scientologist, so she called the baby Sunday as a sort of painfully oblique jab at Scientology. See?

Insulted, Tom Cruise has vowed to even the score by naming his next child after something that's important to Scientology, meaning that in a few years we can all say hello to little Unnecessarily Litigious Cruise or Unsettling Public Image Cruise.

Nicole Kidman isn't a bitter woman. Or at least we don't think that Nicole Kidman is a bitter woman – we haven't really been able to discern a single identifiable facial expression of hers other than 'mildly startled' since about 2004 – but if this new report is true then we might have to reverse our decision.

On Monday morning Nicole Kidman finally gave birth to her first biological baby, and we're absolutely certain that it was a moment of sheer, undiluted, life-changing joy for both her and Keith Urban. Nothing could have made the moment more perfect.

Well, except for Nicole Kidman deliberately giving the baby a name that would nark off Tom Cruise, anyway.

And that's what some are saying she did. Nicole Kidman's new baby is called Sunday Rose, which is obviously a direct insult to all Scientologists. Obviously. Don't believe us? MSNBC has spoken to a source who definitely exists and has obviously got all of the obvious facts:

“Nicole is a Catholic, and Sunday was an important religious day for her until she was involved in Scientology,” said the source. “She’s still bitter about her experience with Scientology and the fact her baby’s name could be perceived as one last jab doesn’t exactly upset her.”

Yeah! Take that, evil Scientologists! If naming a baby after a day of the week that has equal importance to every other day for them doesn't finish the religion off for good, nothing will! This is bound to hit Scientology harder than anything since the time that Halle Berry named her baby Nahla Ariela, which is an anagram of Anal Ear Hail, which is – oh, we don't know – something that Xenu invented or whatever.

Of course, there's also a report claiming that Nicole Kidman decided to call her baby Sunday Rose because Keith Urban had written a song called Sunday about the baby, and that probably sounds a bit more true.

Note to any Keith Urban fans reading – that's a brand new song called Sunday as opposed to the existing Keith Urban song Raining On Sunday, which Keith wrote before he met Nicole Kidman and was just a lonely cowboy with a dream of having a baby, naming it Sunday and getting to piss all over it whenever he liked. We don't want any confusion.