Puerto Rico, Registro Civil Puerto Rico, Civil Registrations, 1885-2001
Name: Florence M Peterson ***
[Florence M Marshall]
Gender: Hembra (Female)
Event Type: Marriage
Birth Date: abt 1877
Marriage Date: 23 dic 1910 (23 Dec 1910)
Marriage Place: San Juan, Puerto Rico, USA
Age at Marriage: 33
Father: Robert Duncan Marshall
Mother: Mary Jane Smith
Spouse: Thomas Elmgren
Spouse Gender: Var?n (Male)
Spouse Age at Marriage: 34
Spouse Father: John Elmgren
Spouse Mother: Magdalena Marin

*** married previously ?
........................................................................................

U.S., Consular Registration Certificates, 1907 - 1918
Name: Thomas Elmgren
Birth Date: 6 May 1877
Birth Place: Princeton, Ill.
Spouse: Florence M Elmgren
Residence: Baya mon
Civil Date: 12 Nov 1915

According to this doc:

Thomas left his residence in Porto Rica on 10 Nov 1914 and arrived 12 Nov 1914 in Santo Domingo for the purpose of setting up a buisness.

In case of death his wife Florence M Elmgren of Bayamon PR is to be informed

Florence was born in Cheshire, England

Children are listed as:

Thomas Edward b 5 Feb 1911 Isabela PR
Geraldine F b 5 Feb 1911 Isabela PR
Alice Corrine b 15 Jan 1914 Bayamon PR
Richard Stanley 5 May 1914 Bayamon PR
..............................................................................

New York, Passenger Lists, 1820-1957
Name: Wife 4 Children On 3/1-5 Thomas Elmgren
Arrival Date: 14 Oct 1918
Birth Date: 6 May 1877
Birth Location: Illinois
Birth Location Other: Princeton
Age: 41
Gender: Male
Port of Departure: San Juan,PR
Port of Arrival: New York, New York
Ship Name: Coamo


Thomas Elmgren b 6 May 1877 Princeton
Florence M Elmgren b 25 Nov 1876 Manilla PI

Children:
Richard Stanley 25 Apr 1914
Thomas Edward 5 Jan 1912
Geraldine F 5 Jan 1812
Alice Corrine 15 Jan 1913

................................................................................

1920 United States Federal Census
Name: Florence Elingren
Age: 43
Birth Year: abt 1877
Birthplace: Philippine Islands **
[Philippines]
Home in 1920: San Jose, Santa Clara, California
Street: Locust
Race: White
Gender: Female
Relation to Head of House: Wife
Marital Status: Married
Spouse's Name: Thomas Elingren
Father's Birthplace: Scotland **
Mother's Birthplace: England **
Able to Read: Yes
Able to Write: Yes
Occupation: Housewife

Thomas Elingren 43 Birthplace: Illinois
Florence Elingren 43 ***
Geraldine Elengren 7 Birthplace: Puerto Rico
Thomas Elengren 7 Birthplace: Puerto Rico
Dick Elengren 5 Birthplace: Puerto Rico
[5 6/12]
Alice Elengren 6 Birthplace: Puerto Rico
........................................................................................

1910 United States Federal Census
NAME: Fhomas B Elmgren
BIRTH: abt 1876 - Princeton
RESIDENCE: 1910 - Tanama, Arecibo, Puerto Rico

This looks like the same Thomas

.......................................................................................

There appears to be a lot of variation in birth places and date o birth but all the above seem to be from the same family.

FamilySearch:
United States Veterans Administration Pension Payment Cards
Name: Thomas Elmgren
Beneficiary's Name: Florence M Elmgren
Event Type: Pension
Event Date: 1907-1933
Event Place: United States
Form Type: Army Invalid
Death Date: 04 Jul 1926

Affiliate Publication Title: Veterans Administration Pension Payment Cards, 1907-1933 , Affiliate Publication Number: M850 , GS Film number: 1634713 , Digital Folder Number: 004692473 , Image Number: 00610

This might be Magdalen's death

California, Death Index, 1905-1939
Name: Magdalen Elmgren
Birth Year: abt 1846
Death Date: 11 Dec 1928
Age at Death: 82
Death Place: Santa Clara, California, USA