Where is Robert in 1881 and 1891?

[Cas (stallc)]

There is a possibility that Elizabeth Barbara was niece or illegitimate daughter of Robert.

Marriage
Name   Isabella Clark - John Carse same page
Registration Year   1845
Registration Quarter   Oct-Nov-Dec
Registration district   Alnwick Northumberland
Volume   25 Page 273   

Possible death of John 1848, Alnwick?

Isabella Carse
Age   28
Marriage Date   6 May 1854
Marriage Place   Gateshead,Durham,England
Spouse   William Ternent
FHL Film Number   252794, 252795, 252796, 252797, 252798, 252799, 252800, 90786

1861
William Ternent 43 Head
Isabella Ternent   33   Wife
Jane Ternent 10 Daughter - married William John Snowdon  in 1875
Mary J Ternent 4 Daughter - middle name Isabella
William Ternent 1 Son

1891
William J Snowdon 41   Head
Jane Snowdon   40   Wife
William J Snowdon 14   Son
Ernest Snowdon 12   Son
Mary I Snowdon 10   Daughter
Lena Snowdon 8   Daughter
Norman Snowdon 5   Son
Elizabeth B Termaat 28   Visitor

Cas

[durhamgirl73]

 

[Spelk]

Going back to  the original question - we still have not found Robert TERNENT in 1891 - unless I have missed it.
So we have his birth index -
GRO has birth q4 1868 Robert Arkless TERNENT mmn MCNAY Easington 10a 374.
His Marriage index -
Marriage q2 1899 Auckland 10a 440 Robert TENNANT and Elizabeth FORSTER.

He is on the 1939 register in Dipton with his wife Elizabeth and gives the March month for his birthday which fits what he gave for an age in 1921. However the year he gives is 1869; But then he never was sure how old he was.
I have not bought his birth certificate (has anyone?) which is available for £2.50. If it matched the day and month he gave in 1939 then that would be quite conclusive but why was his birth registered in q4 of 1868. Could it have been a typo in 1939 or maybe he did not even know the month he was born in.

Similarly has anyone got his marriage certificate to see if the name and occupation of his father fits?

[durhamgirl73]

born 17th October 1868 Thornley

dad Robert is a coal inspector

is it possible to search the 1939 census with this date of birth?

[Cas (stallc)]

born 17th October 1868 Thornley

dad Robert is a coal inspector

is it possible to search the 1939 census with this date of birth?

It is.. searching 1939 for Robert with that birthdate has zero results.

[durhamgirl73]

Thankyou for checking

[Spelk]

I could not see a way to search for people born on a specific date in FindMyPast but eventually managed on Ancestry. There were 630 people born on 17 Oct 1868 in the 1939 Register of which these were called Robert -

1839 Surrey Robert BUCKLE born 17 Oct 1868.
1939 Kent Robert BOWMAN born 17 Oct 1868
1939 Lancashire Robert POMPHRETT born 17 Oct 1868
1939 Shropshire Robert W EDWARDS born 17 Oct 1868
1939 Sussex Robert HEANEY born 17 Oct 1868
1939 Suffolk Robert WARDEN born 17 Oct 1868
1939 Glamorganshire Robert WILLIAMS born 17 Oct 1868
1939 Caernarvonshire Robert R JONES born 17 Oct 1868
1939 Durham Robert W WILSON born 17 Oct 1868
1939 Durham Robert S ERRINGTON born 17 Oct 1868

Nothing looks helpful though.

Edit
Missed these
Robert O JONES Lancashire
Robert H PARRY Cardiganshire

[durhamgirl73]

wow ty 

(what about Ternent/Tennent, etc  )

[Spelk]

No luck using just the surname.
By 1939 he could well have been dead or emigrated.
That DNA link you have is best evidence - if you have ruled out any other possible link and have some appropriate shared matches and maybe even have checked which bits of chromosomes are matching.