Researching Sawkill/ Dempsey family Newcastle 1881 census

[bewitched1965]

I'm researching the Sawkill/ Dempsey family in Newcastle, who appear on the 1881 census and something has me puzzled.  Matthew Sawkill is down on the 1881 census as 'head of the family.
He is with his wife Sarah, and three grandchildren,  Sarah, William and Abraham Dempsey. I have Abraham's birth certificate which lists his father as William Dempsey and his mother as Mary Dempsey, formerly Robertson.   I can't find Mary and William anywhere, and if Mary's maiden name was Robertson, where does the Sawkills come into it?  I'm very new to genealogy, so please be gentle with me!

[ColC]

Welcome to Roots Chat prepare to become very confused.

Freebmd =  William Dempsey married Mary Robson in Newcastle in Q4/1865

DEMPSEY, ABRAHAM  MATTHEW JOSEPH    ROBERTSON 
GRO Reference: 1879  S Quarter in NEWCASTLE ON TYNE  Volume 10B  Page 110

Matthew Sawkill married Sarah Robertson Q1/1863 Newcastle


Colin

[ColC]

Maybe this is William born about 1847, however Sarah was born about 1831 on 1881 census.

Deaths Jun 1881
DEMPSEY    William    34    Newcastle T.    10b   60

Colin

[ColC]

1871 census.

https://www.familysearch.org/ark:/61903/1:1:V5BY-TW7

Colin

[River Tyne Lass]

 Welcome to RootsChat!

http://www.marriage-locator.co.uk/cgi-bin/ML_search.cgi?year=1863&qtr=1&vol=10b&page=157&search=search

Marriage Locator indicates 1863 marriage was at St Nicholas Cathedral, Newcastle

https://www.familysearch.org/ark:/61903/1:1:NKWG-Q4B

Familysearch gives date as 31 March 1863

http://www.marriage-locator.co.uk/cgi-bin/ML_search.cgi?year=1865&qtr=4&vol=10b&page=275&search=search

1865 marriage between All Saints and Record office.

[softly softly]

Just for info--3 births

DEMPSEY, WILLIAM  ROBERTSON     ROBERTSON 
GRO Reference: 1871  J Quarter in NEWCASTLE UPON TYNE  Volume 10B  Page 64

DEMPSEY, JAMES  PETER     ROBERTSON 
GRO Reference: 1867  D Quarter in NEWCASTLE UPON TYNE  Volume 10B  Page 66

DEMPSEY, SARAH  ELLEN     ROBERTSON 
GRO Reference: 1866  S Quarter in NEW CASTLE UPON TYNE  Volume 10B  Page 97

Possible another 2 births

DEMPSEY, ELLEN       ROBERTSON 
GRO Reference: 1873  M Quarter in NEWCASTLE UPON TYNE  Volume 10B  Page 116

DEMPSEY, MARGARET       ROBERTSON 
GRO Reference: 1881  J Quarter in NEWCASTLE UPON TYNE  Volume 10B  Page 104

John

[River Tyne Lass]

https://www.familysearch.org/ark:/61903/1:1:N165-SX8

Might this be William Dempsey's baptism?
Birthdate 30 May 1846
Baptised St Mary 14 June 1846
Parents Daniel Dempsey & Helen McDonald

[bewitched1965]

Many thanks to all those  who have replied so far : you've given me some food for thought there!

But I still can't see where Matthew Sawkill, the Grandfather is in  relation to the other family members named.

[River Tyne Lass]

I think your next step might be to purchase the 1863 marriage register entry from either Tyne and Wear Archives or Northumberland Archives.  I think RootsChatter Boo, might advise the latter as the cheapest option - I think they might send you a copy by email for £5 since you now know the exact venue and date - St Nicholas, 31 March 1863.  This might give you more clues about Matthew's background, such as who Father may have been or even if there was a known Father.  Once you have this, perhaps there might be more clues to work on.