As I’d become totally confused, I’ve gone back to basics ...
According to the California death index:
Leopoldine Lapierre Wheatley/Knudson was born on
28 Oct 1894 in Canada and died on 02 Jul 1992 in Almeda, California. Her mothers surname is Martel.
(
https://www.familysearch.org/ark:/61903/1:1:VPSQ-GQN and
https://www.familysearch.org/ark:/61903/1:1:VP6V-KCK )
In the 1910 census in Oakland Ward 7, Alameda, California, we can find:
Arthur Lapierre b abt 1859, widowed, occupation photographer
Leopoldine Lapierre b abt 1895
Edgar Lapierre b abt 1896
Note: The family had immigrated to the US abt
1907/8.
(
https://www.familysearch.org/ark:/61903/3:1:33SQ-GRJD-S23?i=21&cc=1727033 )
In Feb 1915, a 20 year old
Leopoldine Rose Lapierre (
b Montreal, QC) immigrates from Canada to the States.
She is on her way to Oakland (CA), but had been living in Calgary, AB. This is also where her brother
Armand Lapierre is residing.
Her US contact is her stepmother Louise Lapierre, but her fiancé had paid for the ticket.
Leopoldine declares that she had previously lived in the USA from
1907-Sep 1914.
(
https://www.familysearch.org/ark:/61903/3:1:3QS7-99DH-X7LX?i=447&cc=2185163 and
https://www.familysearch.org/ark:/61903/3:1:3QS7-99D3-B7SF-9?i=1602&cc=2185163 )
Note#1
On 07 Aug 1914, an Arthur Z Lapierre (55y) dies in Almeda, CA. This could be the reason why Leopoldina had travelled back to Canada in Sep 1914
Note#2
I assume that this is a probability for the brother:
Name:
Armond Camille Henri LapierreEvent Type: Death
Event Date: 11 Jun 1936
Event Place: Vancouver, British Columbia, Canada
Gender: Male
Age: 50
Marital Status: Married
Birth Date: 08 Oct 1885
Birth Year (Estimated): 1886
Birthplace:
Montreal, QuebecFather's Name:
Arthur Camille LapierreMother's Name:
Melina MartellSpouse's Name: Exilda Lapierre
(
https://www.familysearch.org/ark:/61903/1:1:FL5K-13F )
In 1916 in Calgary:
http://data2.collectionscanada.ca/006003/t-21948/jpg/31228_4363977-00715.jpg In Jan 1917, his wife and children are visitng the "Weakley" rellies:
https://www.familysearch.org/ark:/61903/3:1:3QS7-99DH-XXDL?i=610&cc=2185163