Just love these genealogy mysteries!!!!   
To possibly add some more uncertainties, found in Ontario marriage records 
Name: Thomas McGowen Junior  
Birth Place: Thornbury  
Age: 30    Estimated birth year: abt 1856  
Father Name: Thomas McGown 
Mother Name: Ellen McGown 
Spouse Name: Ida Little  
Spouse's Age: 21    Spouse Estimated Birth Year: abt 1865  
Spouse Birth Place: Leslie Quebec  
Spouse Father Name: Henry Little 
Spouse Mother Name: Mary Little 
Marriage Date: 5 May 1886 
Marriage Place: Parry Sound District  
Marriage County: Parry Sound  
                                                                     
Everything a little "off"  but thought I would put it out there anyway in case it somehow fits.
Looked for Louisa, May & Jennie  McGowen b. in Canada did not find them nor any children registered to either a Thomas or John McGowen in Ontario Births 1869-1909. 
sidebar, 
1910 Detroit Ward 11 Wayne Co., Michigan 
Isabel (Belle) McGowen Fraser husband Keith's family 
Keith E Fraser  Age: 16  Est birth year: abt 1894  Birthplace: Michigan  Single  Occ:  Clerk @ RR Co.
Father's name:  Earnest W   Age 36   Birth Place: Canada English  Occ:  Clerk @ Motor Co.
Mother's name: Augusta A    Age 36   Birth Place: Ohio  
son/bro Joseph B Fraser 9  
dau/sis  Rose S Fraser 7  
Frank Barnet {Bennett}  46  Boarder from England
 
Was looking to see if Elinor Frazer,  Roomer in 1920 w/ the McGowen's  was related to Isabel's future husband, Keith .   Not finding  connection.
AND if there were any naming patterns with  Belle/Isabela & Keith's children which might connect  Belle/Isabela's mother as either Julia or Ida.  
Curiously,  in 1900,  Keith's father Earnest Fraser seems to be called "Garnet"  and the family is found in Milwaukee, WI
Garnet W Fraser  Age: 26   Est birth year: abt 1874  Birthplace: Canada English  Head-of-House
Spouse's name: Augusta   Married for 7 years
Mother's name: Margaret 
Occupation:  Clerk for Railroad Freight
Immigration Year: 1890  
wife Augusta Fraser 27  b. Ohio  has had 4 children/2 are living
son  Keith Fraser 6  
dau  Adelaide Fraser 3  
Mother Margaret Fraser 70  b. in Scotland  Married for 50 years   13 children/8 living  Immigration Year:  1884  in US for 15 Years
Not finding Keith and family in 1920.
lissa