Even thought, I'm not that good in english, If I can translate something for you, that will be my pleasure.
Do you know GENWEB ?If you find it, go to Prince Edward Isaland genweb and search for Doiron. There's a lot of them there and not only on PEI. Maybe that research has been done seriously, may be not. However, it gives you some information to verify.
Finaly, I ordered a book called "The Doiron-Gould family" I translated the title for you to understand, but it's a french book written by Allen DOIRON from New-Brunswick. I should receive it in about 2 weeks.