Question: What female author whose works are known to interpret, critique and comment upon the British landed gentry at the end of the 18th century is related to Eliza, Comtesse de Feuillide?

 Austen's plots often explore the dependence of women on marriage in the pursuit of favourable social standing and economic security. Jane Austen ( ; 16 December 1775 – 18 July 1817) was an English novelist known primarily for her six major novels, which interpret, critique and comment upon the British landed gentry at the end of the 18th century.  Her works critique the novels of sensibility of the second half of the 18th century and are part of the transition to 19th-century literary realism. <SEP> Hakīm Sa'd-al-Dīn ibn Shams-al-Dīn Nizārī Bīrjandī Quhistānī (Persian: حکیم سعدالدین بن شمس‌الدین نزاری بیرجندی قهستانی‎ ‎ ), or simply Nizari Quhistani (died 1320 CE), was a 13th-century Ismaili author and poet, who lived in the time of the Imam Shams al-Din Muhammad.  Nizari was born into a family of landed gentry approximately a decade after the capitulation of the Alamut state and hailed from the town of Birjand.  Nizari is the only Ismaili poet of this period whose works are extant. <SEP>  She is believed to have been inspirational for a number of Austen's works, such as "Love and ", "Henry and Eliza", Lady Susan and Mansfield Park.  She may have also been the model from whom the character of Mary Crawford is derived. Eliza, Comtesse de Feuillide (née Hancock; 22 December 1761 – 25 April 1813) was the cousin, and later sister-in-law, of novelist Jane Austen. <SEP> The landed gentry and nobility of Devonshire, like the rest of the English and European gentry, bore heraldic arms from the start of the age of heraldry "circa" 1200-1215.  The fashion for the display of heraldry ceased about the end of the Victorian era (1901) by which time most of the ancient armigerous families of Devonshire had died out, moved away or parted with their landed estates.  In 2015 a very few ancient families remain in the county represented by direct male descendants, most notably Courtenay of Powderham, Fulford of Fulford, Kelly of Kelly, Cruwys of Cruwys Morchard, Clifford of Chudleigh, Acland of Killerton and Broadclyst, Wrey of Tawstock, etc.  A few ancient Devon estates are still owned by descendants via female lines, for example Castle Hill, Filleigh, Molland, Incledon, Braunton, Hall, Bishop's Tawton, Newnham Park, etc.  In most cases the laws of English heraldry preclude the transmission of paternal armorials via a female heiress (other than in the form of quartering), thus most of these inheritors via female lines, generally deriving from the same pool of high-status English armigerous families, bring their own paternal heraldry, possibly previously foreign to Devon, to the estates inherited.  For example, the Irish arms of Gore (Earl of Arran) are now associated with Castle Hill, Filleigh, until 1958 the seat of the last male representative of the Fortescue family which originated in Devon in the 12th century.  In a few cases however, male heirs via female lines have been required by the legator to seek royal licence to adopt his own arms and surname, otherwise destined to disappearance, in lieu of the legatees own.  This was the case with the families most notably of Rolle, Basset, Stucley, Walrond, etc.