Do you know the names of Guiseppe Costanzos brothers who may have also lived in Fernie BC?
A Giovanni Costanzo married my grandfathers Auntie Argia in Trail BC and they then moved to Fernie.
Giovanni was born in region of Colosimi Italy. His parents are listed as S.Gaspere Costanzo and Viola Gigliotti.

There was a Mary Costanzo Gigliotti who ded in 1916 in Fernie and I have yet to research her death record to find out if she could be a relation to my Giovanni/Gigliotti side.
What more do you know of your family in Fernie BC?