Charles & Emily Nicholls from Liverpool

[heywood]

War records might do - I have tried but may have missed him.

I wonder where your cousin got the birth and death details from?
It doesn’t seem that the Lancaster details describe your Emily 

[heywood]

There is a published tree for Ambrose and Emily Nicholls. I don’t think that the birth and death you have quoted is your Emily.

[heywood]

I wonder if this is your ‘Italian’ connection?

Liverpool Electoral Registers show this:

1925 50 Chester Road
Emily Nicholls
Daniel Porcellia

This looks like Daniel in 1911
https://www.familysearch.org/ark:/61903/1:1:XWTK-CD7

More importantly, Daniel died 1933 and probate was granted to Emily Jackson, spinster.

[heywood]

Emily is still at 50 Chester Road in 1929/30

[heywood]

Is this your father?
Arthur Nicholls 17 yrs arriving Montreal 7th December 1931? His address is 30 Brookland Road, Stoneycroft, Liverpool.

Daniel Porcelli died in hospital but his address on the probate record is 30 Brookland Road.

[heywood]

When my father was born in 1913, they lived at 16 King Street Garston Liverpool.

More complications - or interesting facts 

Electoral rolls
1920 16 King Street Garston
James and Rosanna Nicholls

Likely to be this James and Rosanna in 1911
https://www.familysearch.org/ark:/61903/1:1:XWTR-XKS

James Nicholls married Rosanna Southall in 1904

[jonwarrn]

Is this your father?

There's a school record for Arthur Nicholls in Liverpool, I think it came online just yesterday
St John the Baptist Church of England School, Tuebrook
Admitted 16.10.22
Arthur Nicholls
born 18.12.13
parent Charles, occupation Provision Dealer
residence 50 Chester Rd
previous school Ashfield St

Baptisms also added yesterday, possibly including
Garston St Michael
20th Dec 1913
born 18 Dec 1913
Arthur
parents Charles + Emily Nicholls
16 King St
father a General Dealer

[heywood]

This looks to be James in 1881 - no brother Charles
https://www.familysearch.org/ark:/61903/1:1:Q27J-R4ZD

James in 1891 still no Charles but liv8 g in Manchester
https://www.familysearch.org/ark:/61903/1:1:Q5QC-T3Z

Perhaps it is just coincidence re the surname and address 

[heywood]

Looks good Jon