Thelma Peverelle was my great grandmother.
Her maternal haplogroup would have been H6a1 (the haplogroup of two of her tested children).
Thelma was born 5 Jul 1904 in Ontario, Canada.
Thelma's ancestry is now in question, as DNA testing done at 23andme has shown that two of her children do not match descendants of Joseph Alexander Peverelle.
Ontario birth record
1911 Canada Census