Pippa Middleton has FINALLY revealed her baby boy's name - and the meaning behind it is beautiful!

It's been four weeks since Pippa Middleton gave birth to her first child with husband James Matthews, but, until now, his name has been kept under wraps.

Paying a very special tribute to James' brother, Michael, the couple's newborn has been given the name Arthur Michael William Matthews.

The choice of the name Michael has special significance as James' brother died at the age of 22, during a Mount Everest expedition in 1999.

Michael is also the name of Pippa’s father.

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Like the Duchess of Cambridge, Pippa gave birth at the private Lindo Wing of St. Mary’s Hospital in London, on 15 October.

One day after the birth, a spokesperson for the proud new parents confirmed the news, saying: "James and Pippa have had a baby boy. He was born Monday 15th October at 1.58pm, weighing 8lb and 9oz. Everyone is delighted and mother and baby are doing well."

Pippa and James married in May of last year at St. Mark’s Church in Englefield.