Johnston

I am looking for a birth record for DONALD JAMES JOHNSTON. He was born in May, 1891 in Brunel/Stephenson. At the time of his birth he lived with his parents, Thomas Johnston and Catherine (McDonald) Johnston. Donald had several siblings: John, Robert and Thomas Jr. They were listed in the 1891 Census as living in the Brunel/Stephenson township. Thomas Sr. may have been working as a surveyor or potentially a "lumberman." We have been looking for a long time for his birth record or baptism record. Later in life Donald listed his place of birth as Orillia. However, the census in 1891 was taken only about 6 weeks before he was born so a birth in Orillia may be questionable. We have looked in Orillia area for records but found nothing. The family left Ontario in 1899 and moved to Duluth, Minnesota. My wife is the granddaughter of Donald. She is trying to locate birth records for him so she can claim citizenship as a descendant. Any information is very appreciated!