Hi Ann, here's all I could find, hopefully some clues for you.
In 1901 irish census
at 12 in Kennedy Street (No. 3 Urban, Londonderry)
living with the milligan-lynch family all catholic is a
Levenson Samuel 38 Male Boarder Church of Ireland Russia Drapery Salesman Read and write - Not Married -
In 1911 irish census
Levenson James Bryson Street Pottinger (part of) Down 22 M Co Down General Labourer Church England Read write English Boarder Single
Levenson Bernard Market Square Cavan Urban Cavan 34 M Russia General Merchant Jewish Read and write Head of Family Married 9
Levenson Leah Market Square Cavan Urban Cavan 32 F Russia Jewish Read and write Wife Married 9 4 4
Levenson Abraham Market Square Cavan Urban Cavan 7 M Co Cavan Scholar Jewish Read only Son Single
Levenson Isaac Market Square Cavan Urban Cavan 3 M Co Cavan Scholar Jewish Cannot read Son Single
Levenson Ettie Market Square Cavan Urban Cavan 8 F Co Antrim Scholar Jewish Read and write Daughter Single
Levenson Mena Market Square Cavan Urban Cavan 4 F Co Cavan Scholar Jewish Cannot read Daughter
From PRONI e-catalogue
PRONI Reference Date(s) Title/Description
D619/26/B/29 12 June 1828 Peel to Anglesey about the suitability of
D619/26/B/30 15 June [1828] Peel to Anglesey replying to Anglesey's
D638/12/29 16 June 1691-26 June 1691 Camp of Ballimoor. Has resolved to march . I noted uses three spellings Leusson's (Leveson) regiments, Lewston's (Levenson)
I think these are probably red herrings for your search
Hamilton Levenson 1848-1916 in the 1911 census he is HAMILTON LEVENSON
Birth Year 1849 Age 62
Born COUNTY DOWN IRELAND RESIDENTHead of Household Occupation CARETAKER SIMON LANGTON BOY'S SCHOOL
Address 107 BROAD STREET CANTERBURY
My note that phrase COUNTY DOWN IRELAND RESIDENT is strange to find in the census for 1911. His birth needs to be checked on GRONI
In ancestry Ireland there is a MARY ANN LEVESON marrying in 1791 with her father JAMES present in a Co Antrim place that includes Belfast
In Ros Davies co Down website
http://freepages.genealogy.rootsweb.ancestry.com/~rosdaviesis a John LEVISON Moira of Laney; a flesher in 1910 POD
In
http://www.nifhs.org special genealogy search engine results include
In 1901 irish census
at 12 in Kennedy Street (No. 3 Urban, Londonderry)
living with the milligan-lynch family all catholic is i
Levenson Samuel 38 Male Boarder Church of Ireland Russia Drapery Salesman Read and write - Not Married -
In 1911 irish census
Levenson James Bryson Street Pottinger (part of) Down 22 M Co Down General Labourer Church England Read write English Boarder Single
Levenson Bernard Market Square Cavan Urban Cavan 34 M Russia General Merchant Jewish Read and write Head of Family Married 9
Levenson Leah Market Square Cavan Urban Cavan 32 F Russia Jewish Read and write Wife Married 9 4 4
Levenson Abraham Market Square Cavan Urban Cavan 7 M Co Cavan Scholar Jewish Read only Son Single
Levenson Isaac Market Square Cavan Urban Cavan 3 M Co Cavan Scholar Jewish Cannot read Son Single
Levenson Ettie Market Square Cavan Urban Cavan 8 F Co Antrim Scholar Jewish Read and write Daughter Single
Levenson Mena Market Square Cavan Urban Cavan 4 F Co Cavan Scholar Jewish Cannot read Daughter
From PRONI e-catalogue
PRONI Reference Date(s) Title/Description
D619/26/B/29 12 June 1828 Peel to Anglesey about the suitability of
D619/26/B/30 15 June [1828] Peel to Anglesey replying to Anglesey's
D638/12/29 16 June 1691-26 June 1691 Camp of Ballimoor. Has resolved to march . I noted uses three spellings Leusson's (Leveson) regiments, Lewston's (Levenson)
I think these are probably red herrings for your search
Hamilton Levenson 1848-1916 in the 1911 census he is HAMILTON LEVENSON
Birth Year 1849 Age 62 Born COUNTY DOWN IRELAND RESIDENT
Head of Household Occupation CARETAKER SIMON LANGTON BOY'S SCHOOL
Address 107 BROAD STREET CANTERBURY
My note that phrase COUNTY DOWN IRELAND RESIDENT is strange to find in the census for 1911. His birth needs to be checked on GRONI
In ancestry Ireland there is a MARY ANN LEVESON marrying in 1791 with her father JAMES present in a Co Antrim place that includes Belfast
In Ros Davies co Down website
http://freepages.genealogy.rootsweb.ancestry.com/~rosdaviesis a John LEVISON Moiraof Laney; a flesher in 1910 POD
In
http://www.nifhs.org using its special genealogy search engine the eight results are important for you to look up
That’s as far as I can help , good luck