Guillaume  DEGUISE dit FLAMAND

Québec Généalogie - What is a 'dit/dite' name?  When the first settlers came to Québec from France it was a custom to add a 'dit' nickname to the surname. The English translation of 'dit' is 'said'. The Colonists of Nouvelle France added 'dit' names as distinguishers. A settler might have wanted to differentiate their family from their siblings by taking a 'dit' name that described the locale to which they had relocated. The acquiring of a 'dit' name might also be the result of a casual adoption, whereby the person wanted to honor the family who had raised them. Another reason was also to distinguish themselves by taking as a 'dit' name the town or village in France from which they originated. This custom ended around 1900 when people began using only one name, either the 'dit' nickname or their original surname.

Source: American-French Genealogical Society, Woonsocket, Rhode Island (www.afgs.org/ditnames/index1.html)

Guillaume was a Maitre macon.
The maçon, or mason, was a person who worked in stone or brick construction. Also known as a brick mason, stone mason or bricklayer, the mason was a craftsman who laid bricks to construct brickwork, or who laid any combination of stones, bricks, cinder blocks, or similar pieces.
Source: tfcq.ca

A Journey Through Time: Life as a Maçon in 18th Century New France