David Beckham has taken matters into his own hands and explained the reasons behind naming his new daughter Harper Seven. 

The star posted a video blog on his Facebook page, which reveals that the inspiration for her middle name, Seven, didn't just come from his football jersey:

"A lot of people have assumed that it's just because it was my shirt number that I wore for many years, and part of it is. Part of it is because I had so much luck around wearing that number, wearing it for England, wearing it for Manchester United - it was such an influential number throughout my career, and a lucky number, but that wasn't the main reason."

He added that spirituality came into the decision and the number has strong significance:

"The other reasons behind 'Seven' were because it symbolises spiritual perfection, Seven Wonders of the World, seven colours of the rainbow and in many cultures around the world, it's regarded as a lucky number. We love the name. We love Harper Seven."

Watch part of David's explanation here: