Lady Mary Chichester married in 1655 as his first wife John St Ledger (d.1696) of Doneraile, County Cork, Ireland.
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William Fellowes (d.1724) married in 1695 Mary Martyn, daughter and heiress of Joseph Martyn (d.1718) of St Mary-at-Hill parish in the City of London by his wife Mary.
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A fine neo-classical mural monument to Joseph Martyn with Latin inscription exists in St Mary-at-Hill Church.
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Their eldest son was Arthur St Ledger, 1st Viscount Doneraile, MP for Doneraile 1692-3, Privy Counsellor and raised to the Irish peerage in 1703.
In 1794 he succeeded to the estates of his uncle Henry Arthur Fellowes at Eggesford in Devon, taking the name and arms of Fellowes.