I am also a descendant of Lambertus Vandersluys.Robert Vandersluys born 1815 St Winnow was my g.g.grandfather. Thought you might be interested in the following: Jenny Vandersluys dau. of Lambertus and Mary was born Kingston upon Hull 1752. Mary was born Newcastle upon Tyne in 1754 - she married John Young in Lostwithiel in 1780. Hannah was born Old Swinford, Worcester in 1756. The family moved about alot!Lambertus was originally a stage dancer and then became a soldier.
Re. Cornish Vandersluys - George 1790-1839 married twice: 1. Ann George (1783-1828) m. in Lostwithiel in 1813. 2.Elizabeth Richards (1800-1865) m. in St.Clement in 1836. William George (1813-1850) married Eliza Hocking in 1838 at Merther, Cornwall.(The Jane Vandersluys who lived in Beacon was my g.g.grandmother, widow of Robert).
Hope this is helpful.The trouble with the Vandersluys family is that they keep using the same names!