Hi, What time frame are you researching ?
What research have you already done?
Do you know If,When?Where? your Ggrandmother Jessie MAKSYMOVICH [sp] passed away?
Registration of Death /Long form Death Certificate should show her maiden name - place of birth, names of parents including maiden name [ all depends on knowledge of the informant ]
The Marriage of your Ggrandmother Jessie to your Ggrandfather Fred SOROWSKI - will be the more accurate - since information comes from the bride and groom
Will show place of birth - date of birth - names of both sets of parents including maiden name of the mothers.
Obituaries for your GGrandmother and her husbands MAKSYMOVICH , SYMKO, Fred SOROWSKI may show names and locations of other family members.
Perhaps family submitted family history/stories to a local history book project for the area where they lived.
Depending on the time family were in Canada
Census for 1901,1906,1911,1916 - may show all family members.