06/03/2013 06:35 GMT | Updated 06/03/2013 06:37 GMT

Kate Middleton Baby: 'I'll Take That For My D...itsy Younger Sister'

The Duchess of Cambridge appeared to let slip the sex of her unborn baby on Tuesday after apparently telling an onlooker who gave her a teddy bear: "Thank you, I will take that for my d..."

The royal rumour mill is now throbbing with speculation over what she may call her newborn. Kate is 21 weeks pregnant and due to give birth in July.

Some have said Kate should call her baby Diana, after her husband's late mother, or Elizabeth, the great grandma of the baby-to-be.

However some have suggested the royal Duchess was actually less than impressed with the teddy bear. Perhaps it didn't meet royal standards of playthingery? Here's a round up of the things Twitter users are imagining she might have been about to say instead of 'daughter'.. (with a few of our own suggestions thrown in)