David Beckham explained Friday why he and his wife Victoria decided to name their daughter Harper Seven.

"A lot of thought goes into our children's names and Harper is a name that we've loved for a long time for a couple of reasons," the English soccer star said in a video on his Facebook page.

"One of the reasons is Harper is an old English name which we love and one of the other reasons is Victoria's favorite book is 'To Kill a Mockingbird' and the author is Harper Lee," he added.

Beckham, 36, then offered insight into the newborn's unusual middle name, "A lot of people have assumed that it's just because it was my shirt number [seven] that I wore for many years, and part of it is."

"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."

"The other reasons behind 'Seven' were because it symbolizes spiritual perfection, seven wonders of the world, seven colors of the rainbow and in many cultures around the world, it's regarded as a lucky number," he added. "We love the name. We love Harper Seven."

The girl, born July 10, is the latest addition to the Beckham brood, joining big brothers Brooklyn, 12, Romeo, eight, and Cruz, six.

The former Spice Girls member also gushed about her daughter, tweeting to fans Thursday she had "fallen in love all over again!"

"Baby Harper is the most beautiful baby girl I have ever seen," the 37-year-old wrote.

"We all feel so blessed and the boys love their baby sister so much!!!" the fashion designer added.

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