Hi:
A few finds:
http://en.wikipedia.org/wiki/Main_PageNicasius was born in Mechlin, Belgium in 1543, the son of Nicolas de Sille and Barbara van der Goes. His grandfather, Antonius de Sille, was a page for Philip, Duke of Burgundy.
See Familysearch.org:
https://familysearch.org/ark:/61903/2:2:37CV-KJ8https://familysearch.org/search/collection/list/?page=1&...The surname De Sille might have originated from the Netherlands. See Familysearch for their collections:
https://familysearch.org/search/collection/list/?page=1&...Good luck!
Lucie