The 7lb 10oz tot arrived on Sunday morning, and was said to have caused her proud dad David to 'cry with joy.'
Harper's big brothers, Brooklyn, Cruz and Romeo are reportedly overjoyed with their new sister.
Sources said the couple chose Harper as it is an 'old English name which Victoria has always liked' whilst Seven is a 'very lucky happy number and the baby was born just after 7am, in the seventh month.'
We're wondering if it's either after that well-known GCSE favourite 'To Kill a Mocking Bird' or Harper's Bazaar. And the Seven could be after David's Man U shirt number.
Hmm - the bookies didn't see that one coming back in February when KATHERINE was tipped as odds on fave...
Or maybe they are big Seinfeld fans? See the video.
What do you think of the name? Can you see a clutch of other new mums following suit?
Go to our facebook page to join in our poll of what Harper Seven sounds most like - a loo cleaner, a level of Call of Duty,...?