Manon Bonner Antoniazzi LVO (née Jenkins, previously Williams; born 15 April 1965) is a Welsh senior civil servant.

[3] Antoniazzi was a pupil at Ysgol Llanhari, a Welsh-medium school for ages 3 to 18 in the village of Llanharry, Rhondda Cynon Taf, Wales.

[12][13] Antoniazzi was appointed Chief Executive and Clerk to the National Assembly for Wales, assuming this position in April 2017 with a salary of £125,170.

[16][17] She has been governor of the Royal Shakespeare Company and a member of the advisory boards of the Philharmonia Orchestra and Welsh National Opera.

[17] Since August 2018 Antoniazzi has been on the board of directors of the Royal Welsh College of Music & Drama,[18] and is the Deputy Chair.

[22][23] Her first marriage was to the international Welsh baritone opera singer Jeremy Huw Williams on 18 September 1991 at St John's College Chapel, Cambridge.

They were married in Lake Como, Italy, and held a wedding party at the Royal Welsh College of Music & Drama in Cardiff.