As you probably know, there is a great resource for descendants of Mary LeCompte & Edward Cator at http://catorfamily.com/genealogy/dorchestercatorsgen1.htmhttp://catorfamily.com/genealogy/dorchestercatorsgen1.htm, which documents at least 5 generations of descendants.
Also, your branch of the family is documented by Elias Jones in "Revised History of Dorchester County Maryland" (Read-Taylor Press, Baltimore, 1925).
Mary LeCompte was the youngest child of Moses LeCompte (1690-1776) and his first wife Levina Patrica Pattison (abt 1680 - aft 1731) who married abt 1716 in Dorchester. Levina was the daughter of Thomas & Ann Pattison, who had at least 9 children. Levina was first married to Matthew Driver abt 1701 and had a son bearing his name. After Levina's death, Moses married Rebecca Stokes, but did not bear any more children.
Mary's siblings, in addition to her half-brother Matthew, were Moses, Levina, and Esther. Brother Moses married Nancy Pattison and had at least five children. Sister Levina marriedWilliam Geoghegan, the teacher brought over from Dublin, Ireland as a teacher for Antoine LeCompte's grandchildren. They had as many as 7 children. Sister Esther married Matthew Skinner.
Mary's father Moses, was a son, one of 11 children, of Moses LeCompte (1664-1720/1) and Mary Skinner (b. abt 1667). Mary was the daughter of immigrants Thomas & Elizabeth Skinner. Moses was the son of immigrants Antoine LeCompte and Hester Dottando, who had a total of 6 children.
According to Thomas & Daniel LeCompte, two blind great-grandchildren of Antoine, Mary's grandfather Moses went blind by the age of 22 or 23. His father, Anthony, sent him to England for treatment, but to no avail. Mary Skinner married Moses after his blindness and 9 of their 11 children (all but Peter and Anthony) went blind as did at least 42 descendents. In 1819, at least nineteen living descendants were blind with what is now believed to be a genetic disease known as Retinitus Pigmentosa.
Maryland Historical Magazine, Vol 12, (1917) starting page 50:
The will of Moses LeCompte was made 1 January 1717, and proved 15 March 1720/1. He bequeathed to his sons Philip, Thomas and Samuel LeCompte, 'all my lands I now live, but if it please God any more of my children should lose their sight except my sons Moses LeCompete and Peter LeCompte, that my said children so losing their sight should be equal partners in my said lands with my aforesaid three sons': he gave to 'my said children one small tract of called 'Padan-Aram', except my sons Moses LeCompte and Peter LeCompte; and to the last named, 'the said land lying in Little Choptank': he mentions his three daughters Esther LeCompte, Mary LeCompte and Elizabeth LeCompte. The witnesses under the will were John LeCompte, Joseph LeCompte, Elizabeth Bonner and Racher Bonner (Annapolis Wills, XVI, 365). The administration accounts of the estate mention the wife, Mary, with three sons Philip, Samuel, and Joseph, as the executors (Annapolis Accounts IV 70, v 18, 286). Moses LeCompte married Mary Skinner (daughter of 'old' Thomas Skinner of England according to family record of 1819). A deposition of Mary LeCompte in 1741 gives her age as 'about 74 years' (Dorchester County Records XIV, 200).
From Dennis Stanley:
"Moses LeCompte and Levina his wife" sold "to their son Mathew Driver" at 1/2 of The Grove, on Oyster Creek, James Island, Dorchester County, Maryland, Great Britain, on 11 Aug 1731. He was land-note Moses LeCompte is mentioned in the Land Records of Dorchester County, as owning this land on 11 Jun 1740 at Padanaram, Taylor's Island, Maryland, Great Britain. He purchased at Patricks Progress, Taylors Island, Maryland, Great Britain, on 18 Oct 1763 purchases 144 acres from John Brahaun, on the east side of Hawtree Cove and south side of Oyster Creek, adjacent to Hog Pen Neck and Dover. He "purchased Armstrongs Folly on James Island excepting the 15sq. feet where the parents of Thomas Pattison are buried" as recorded in the Land Records of Dorchester County, McAllister on 13 Jun 1766 at Armstrongs Folly, north side of James Island, Dorchester County, Maryland, Great Britain. He was blind. Many descendants would also grow progressively blind as a result of Retinosis Pigmentosa. The genetic disorder seemed to manifest once family members reached adulthood. As the LeCompte "blood" grew more diluted with each passing generation the blindness became less common.
From Simpson and Elias Jones:
He executes a deed with his wife, giving to "our loving son Matthew Driver," one half of the "Grove," on James Island (Dorch. Co. Deeds, VIII. 429).
He also gave a deed of gift, on 8 March 1768, for " natural love and affection which I have and do bear to my three grandsons Levin Cator, William Geoghegan and Moses Geoghegan," as follows; "unto my grandson Levin Cator, one half of the whole survey of "LeCompte's Addition" (34 1/2 acres) on James Island, in Dorchester County : unto my two grandsons William and Moses Geohegan the eastern-most half of "LeCompte's Addition," equally, and my part of "Grove," (75 acres) lying on James Island, Dorchester County."
He also refers to his daughter Levinia Geoghegan (Dorch. Co. Land Records, XXII.222).