Ann Conner Nee Foster - Walker Northumberland

[O.R.A.W.M.U]

Does 1939 birth date for William match the one showing on Find a Grave 15 Dec 1884?

Yes the 1939 register matches Williams DOD as 15 Dec 1884

[O.R.A.W.M.U]

This is starting to look promising!

1881 census same address!

Name   Hannah Muras
Age   17
Estimated Birth Year   abt 1864
Relationship to Head   Daughter
Father   William Muras
Mother   Elizabeth Muras
Gender   Female
Where born   Newcastle, Northumberland, England
Civil parish   Newcastle on Tyne All Sts
County/Island   Northumberland
Country   England
Street Address   No 7 Melbourne St
Registration district   Newcastle Upon Tyne
Sub registration district   All Saints
ED, institution, or vessel   13b

William Muras 38 Head
Elizabeth Muras 36 Wife
Hannah Muras   17
Benjamin Muras 11
Isaac Muras 10
Andrew Muras 8
John Muras 6
Septimus Muras 1

[River Tyne Lass]

https://www.rootschat.com/forum/index.php?topic=667754.0

I think the above thread relates to Hannah's cause of death - phthisis pulmonalis - in other words TB.

Gosh, you have managed this death cert quickly!

Yes, I agree it all seems to be very promising.  I wonder if there was an error made by someone when date of birth for Ann was provided for 1939 register?