George Henry William Child-Villiers, Viscount Villiers (born 2015)

[Michael Rhodes]

_. The Countess of Jersey [nee Marianne de Guelle], wife since 2003 of [George Francis] William Child-Villiers, 10th Earl of Jersey [Peerage of England cr 1697] (born 5 February, 1976), gave birth to a son and heir, George Henry William Child-Villiers, styled Viscount Villiers, 1st September, 2015, a brother for Lady Mia [b 28 Dec, 2006], Lady Amelie [b 14 Apr, 2008], & Lady Evangeline [b 9 Feb, 2011].

The Countess of Jersey is the former Marianne de Guelle, daughter of Peter de Guelle, of Jersey.

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[marquess]

Wasn't the current earl briefly styled Viscount Grandison after his father Viscount  Villier's death? My understanding is that the family oscillate between the two titles with each each new viscount. 

[Jelena JS]

From the earl's twitter:
William Jersey ‏@EarlofJersey Sep 1

Delighted to report that our son, George Henry William, Viscount Villiers, was born at 9:41am. Future 11th Earl of Jersey. Mum & he are fine