Salut Pierre! I think I solved the mystery-fautly information! A long time ago I came across a tree in Rootsweb posted by someone from a foreign country ( Norway or Sweden, if memory serves me correct). I found it odd because she had posted Girardin as "dit Desjardins" and no one in my family had heard the Girardins use it. So not to worry, Roseanna has been faithful!
Sorry for the mixup, Pierre.
Now I am even further behind on my Girardins. I can't even get a handle of my grandfather's birthdate! Zut Alors!