The surname Gillas was first found in Dumfriesshire and in Warwickshire at Gilson, a hamlet that dates back to 1232 AD. Gilston is a village near Harlow in the county of Hertfordshire. It dates back to 1197 when it was first listed as Gedelston and literally meant "farmstead or village of a man called Gedel or Gydel," from the Old English personal name + "tun." 
This web page shows only a small excerpt of our Gillas research. Another 82 words (6 lines of text) covering the years 1150 and 1500 are included under the topic Early Gillas History in all our PDF Extended History products and printed products wherever possible.
More information is included under the topic Early Gillas Notables in all our PDF Extended History products and printed products wherever possible.
Migration of the Gillas family to Ireland
Some of the Gillas family moved to Ireland, but this topic is not covered in this excerpt. More information about their life in Ireland is included in all our PDF Extended History products and printed products wherever possible.
Some of the first settlers of this family name or some of its variants were: Doctor Gillson who settled in Boston Massachusetts in 1764; followed by Mr. Gillson in 1768; Ann Gilson settled in New England in 1635; Edward Gilson settled in Virginia in 1670.