Thomas Williams junior was listed in the Jamaican Quit Rent books for 1754 as the owner of 1830 acres of land in St James. This was probably 'Col. Thomas Williams jnr.' from the parish of Westmoreland who settled the Good Hope estate (then in St James, later in Trelawny) from 1744. The Thomas Williams who sold Good Hope, Wales and Lansquinet to John Tharp IV for £74,000 currency in 1769 and took (presumably in part-exchange) Tharp's share of Potosi, is treated by A.E. Furness in his detailed account of the Tharp estates as the son of Col. Thomas Williams. This cannot have been the case if Col. Thomas Williams' wife Elizabeth Baker Thomas who died aged 24 in 1762 was his first wife, as is given or assumed in local tourist information on the great house at Good Hope.
Seagrove and Williams were listed in the Jamaican Quit Rent books for 1754 as the owners of 400 acres of land in St Andrew and 275 acres of land in St George, total 675 acres. Williams and Blagrove were listed in the same source as the owners of 2955 acres of land in St Ann. The individuals in these partnerships have not been identified. Seagrove may be Samuel Seagrave (q.v.). Blagrove may be John Blagrove the elder or Thomas Blagrove (both q.v.). There are 13 different individuals with the surname Williams listed in the Jamaican Quit Rent books for 1754.
"A List of landholders in the Island of Jamaica together with the number of acres each person possessed taken from the quit rent books in the year 1754", TNA CO 142/31 transcribed at http://www.jamaicanfamilysearch.com/Samples2/1754lead.htm; A.E. Furness, 'The Tharp Estates in Jamaica', https://fgsj.org.uk/wp-content/uploads/2018/07/The-Tharp-Estates-in-Jamaica-by-A-E-Furness.pdf</>https://fgsj.org.uk/wp-content/uploads/2018/07/The-Tharp-Estates-in-Jamaica-by-A-E-Furness.pdf [accessed 07/04/2020].
The dates listed below have different categories as denoted by the letters in the brackets following each date. Here is a key to explain those letter codes:
1772 [EA] - 1773 [LA] → Owner
Thomas Williams, inferred to have been either the same man as Thomas Williams jun. or his son, reportedly took half of Potosi from John Tharp IV c. 1772 (possibly in part-exchange for the Good Hope, Lansquenet and Wales estates), bought the other half from Elizabeth and William Blake (subject to mortgage from Tharp) and then sold on the whole estate to his brother-in-law Samuel Horlock in 1773.
Probably father and daughter but possibly brother and sister. There is some lack of clarity over Thomas Williams father and son in the histories of Great...