Hi
I have Trollopes in my family too, who lived in Longbridge Deverill.
It is believed that all the Trollopes in the area around Horningsham originated from William Trollop who was a stonemason, part of the team of workers who moved from the north of England to build Longleat House in 1560.  The house took 12 years to complete and the workers all settled in Horningsham and many married local girls.
William Trollop married Avis Trapp.
 “In 1569 John Trapp settled a tenement called Trapp’s Place, in Wells Street (this was in Corsley)  on his daughter Avice when she married William Trolloppe of Horningsham.  Trapp’s son and heir released his right in 1582, and Trolloppe’s son Allen sold the tenement to Sir Thomas Thynne in 1635.  It consisted of a house, three closes adjoining and three acres of field land, and was held of the Manor of Little Corsley”  (Source: Elizabeth Crittall’s History of Wiltshire, Vol 

 from an essay by William Trollop)
Avis Trollop left a Will.
Transcription of her will:
Will of Avis Trollope, widow, written 1617, proved 1624
“ Avis Trollop de Horningsham   In the name of God Amen
I,  Avis Trollope of Horningsham in the County of Wilts widow do make my last will and     in mind an d          I bequeath my soule to the       and my body to be buried as it so please Almighty god  as for my temporal goodes I dispose following    I give and bequeath to my sonne Allon Trolloppe     I give to my soone John Trolloppe   I give to my sonne Roger Trolloppe    my sonne Morris Trolloppe  my goods movable and    moviable   I give and bequest to my daughter Agnes Smyth widow
28th Day of January in the year  of the reign of  Soveraign Lord James by the grace of god of England France and Ireland   …Scotland    Defender of the Faith   Anno Dom 1617
Witnesses to the will Robert Dobson,   Avis Trollop, her mark
Proved May 1624
Wiltshire Record Office have her will on-line.
I am unable to trace my line as far back as William, as the earliest Trollopes I can trace are John Trollop and his wife Esther/Hester who lived in Longbridge Deverill, and was buried there aged 46 in 1808, his wife  died inOctober 1841 and was buried there.   I am still trying to find a marriage between JohnTrollope and Esther, probably at Longbridge Deverill around 1789.
Madwith