wife looking for husband and his birth siblings birth parents.

[font=Comic Sans MS]hi, my name is roxy. i am here trying to help my husband and his birth siblings find their birth parents. my husband and birth siblings were all put up for adoption, their birth names were: Josh ___ ____, David James ___, Angie Ann ___. all three were adopted and ultimately raised together. my husband is David. We do have some information, we know the birth name was Matthews, however not sure if it is the birth mother or birth father's name because they were not married. David and Angie were born in Cochrane Ontario. The birth mother was native and the birth father was french. please if anyone has any information, please respond.[/font]