L'histoire de cette famille en Nouvelle France remonte à l'arrivée de Charles Lemoyne de Normandie en 1641. Au cours des trente années suivantes il participa à un grand nombre d'expéditions contre les Indiens, quelquefois agissant comme interprète. Lemoyne accumula de vastes étendues de terre, y compris les Seigneuries de Longueuil et de Chateauguay, que le Gouverneur Frontenac lui concéda en 1672 et 1673. Lorsqu'il mourut en 1685, il était l'un des Montréalais les plus riches de son époque. Charles a eu deux filles et dix fils. Parmi ces derniers, plusieurs perdirent la vie au cours de batailles, d'autres furent commandants dans diverses localités. L'un d'entre eux, Pierre Lemoyne d'Iberville, fut l'un des soldats les plus célèbres de la Nouvelle France.

A distinguished Canadian architect, teacher and author, Roy LeMoyne served in the RCAF as a Flying Officer with the 113 Bomber Reconnaissance Squadron from 1942-45. After the war he studied at the McGill School of Architecture, graduating in 1951. That year he received a bursary form the Quebec government which allowed him to pursue an internship in Paris in Eugene Beaudoin’s architectural workshop.

He began his professional practice in Montreal in 1952 with Rather, Bland, Trudeau (later LeMoyne, Lapointe Magne) where he worked as partner from 1960 to his retirement in 1995. In 1970 John Bland, Director of the McGill School of Architecture, appointed him auxiliary professor, lecturing on professional practice and specifications.

In 1984, he became the director of research at the Royal Architectural Institute of Canada (RAIC). A fellow at the RAIC, LeMoyne was a member of several other professional associations including the Ordre des architectes du Québec (OAQ); the Association des architectes en pratiques privée du Québec (AAPPQ); the Ontario Association of Architects; and the Canadian Institute of Planners.

LeMoyne’s philosophy was that the design process comprised an information/inspiration mix where information from manufacturers coupled with inspiration from design professionals. He led a wide variety of architectural and urban planning projects in Canada which won him prizes, among others the Sanitary Refuse Collectors Reduction Plant, Ville d'Anjou, Québec (1963, Massey Medal 1964), and the University of Windsor library extension (1972, Design Canada Prize of Excellence 1973).

Helen Lennebacker was born on March 3, 1829, in New York, USA. She was a botanist, specializing in algae, active in California between 1878 and 1894. She died abt 1902 in California, USA.