Sir William Pierce Ashe à Court, 1st Baronet (c. 1747 – 22 July 1817) was a British soldier and Member of Parliament (MP).
In 1795 he was created a baronet, of Heytesbury in the County of Wiltshire.
In 1777 Catherine A'Court died in Cheltenham, Gloucestershire; her memorial plaque in Cheltenham's parish church suggests this was due to her having been poisoned with arsenic by a servant.
The following year à Court married Laetitia Wyndham, daughter of Henry Wyndham and sister of Henry Penruddocke Wyndham, and together they had six children: He died in July 1817 and was succeeded in the baronetcy by his son William, who became Lord Lieutenant of Ireland and was elevated to the peerage as Baron Heytesbury in 1828.
Sidney Herbert and had seven children, including the 13th and 14th Earls of Pembroke & Montgomery.