As Helen says, Irene Edith Clarissa Jane Swain is a different person. However Irene Swain wife of Arthur Swain is also a real person:
Name: Irene Swain
Gender: Female
Departure Date: Feb 1901
Port of Departure: London, England
Destination Port: Demerara, Guyana
Ship Name: Atlantis
Official Number: 89618
Master: D W Hunter
Travelling with Arthur Swain aged 40, civil servant, Gerald Swain aged 5 and Oswald Swain aged 2.
Source: Ancestry.com. UK, Outward Passenger Lists, 1890-1960 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012.
https://search.ancestry.co.uk/cgi-bin/sse.dll?indiv=1&dbid=2997&h=45904824
By 1911 Gerald and Oswald were at boarding school in Horsham Sussex, where they are both stated to have been born in British Guiana - "England and Wales Census, 1911," database, FamilySearch (
https://familysearch.org/ark:/61903/1:1:X713-T4S : 2 August 2017), Gerald Arthur Swain in household of Oswald Bertie Swain, Horsham, Horsham, Sussex, England; from "1911 England and Wales census," database and images, findmypast (
http://www.findmypast.com : n.d.); citing PRO RG 14, The National Archives of the UK, Kew, Surrey.
In 1939 Irene was living in Ealing, Middlesex:
Name: Irene Swain
Gender: Female
Marital Status: Widowed
Birth Date: 8 Jun 1872
Residence Year: 1939
Address: 42
Residence Place: Ealing, Middlesex, England
Occupation: Unpaid Domestic Duties
Schedule Number: 21
Sub Schedule Number: 5
Enumeration District: BCGA
Registration district: 128-4
Household Members:
Name
Ivan C Swain
Dorothy F Swain
Diana J M Swain
Irene Swain
Source: Ancestry.com. 1939 England and Wales Register [database on-line]. Lehi, UT, USA: Ancestry.com Operations, Inc., 2018.
https://search.ancestry.co.uk/cgi-bin/sse.dll?db=1939UKRegister&indiv=try&h=9816148
Ivan Swain was born on 22 Feb 1903 so could well be Irene's son. Dorothy Swain was born on 1 Jun 1904 and is probably Ivan's wife. Diana Swain was born on 23 Feb 1933 and is probably Ivan and Dorothy's daughter.
Irene's probate record:
Name: Irene Swain
Death Date: 8 Jul 1954
Death Place: Surrey, England
Probate Date: 9 Sep 1954
Registry: London, England
Probate was granted to Constance Irene Norton and her husband Charles Norton.
Source: Ancestry.com. England & Wales, National Probate Calendar (Index of Wills and Administrations), 1858-1966, 1973-1995 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2010.
https://search.ancestry.co.uk/cgi-bin/sse.dll?db=UKProbateCal&h=15778140&indiv=try