Hello lyndsey86,
Couldn't find a birth for David with parents William Barclay & Jane/Jean Crow but I did find some Census Returns which look like the family.
1861 Census. Montrose.
Jane Barclay 58 Head
Jane " 19 Dau
Jessie " 17 Dau
David " 13 Son. All born Montrose.
(Transcription doesn't say if Jane is married or widowed. Couldn't find a death for William)
1871 Census. 9 North Tay St, Dundee.
Jane Barclay 66 Pawn Broker
Jane " 28 Dau.
James Lyall 15 G.Son.
Emma Barclay 5 G.Dau.
Jessie " 3 G.Dau.
Jane Johnston 30 Visitor.
Elizabeth " 9 Visitor.
Isabella " 6 Visitor. All born Montrose.
1881 Census. 17 John St, Montrose.
Jane Barclay 75 Confectioner.
Jane " 36 Dau. Dressmaker.
Emmie Smart 15 G.Dau. Linen Weaver.
Jessie " 13 G.Dau. Linen Weaver. All born Montrose.
1891 Census. 12 Peddie St, Liff & Benvie. (Dundee)
Jane Smart 47 Head, Jute Weaver.
Jessie Smart 23 Dau, Jute Weaver.
Jane Barclay 87 Mother, Retired Broker. All born Montrose.
(ScotlandsPeople has a death for Jane Barclay other name Crow, 1897, Barry, Angus)
1871 Census. 25 Hanover St, Edinburgh.
*David Binclay 22 Servant, Waiter b Montrose.
*Binclay might be a transcription error for Barclay. I've included this Census as a possibility. See occupation for David on 1891 Census.
1881 Census. 11 Market St, Montrose.
David Barclay 32 General Labourer b Montrose.
Isabella " 38 Wife - b Tranent, Haddingtonshire.
Mary Martin " 10months Dau. b " "
1891 Census. 49 Cadogan St, Glasgow.
David Barclay 42 Waiter b Montrose.
Isabella " 38 b Tranent.
Mary " 10 Dau b Tranent.
James " 8 Son b Montrose.
Horace " 5 Son b Dundee.
Duncan Primrose Barclay 2 Son b Glasgow.
1901 Census. Elm Row, Lasswade, Midlothian.
Mary Barday 20 Head b Tranent. (Barday transcription error for Barclay?)
William " 18 Brother, Coal Miner b Montrose.
Horace " 10 Brother, Coal Miner b Dundee. (Age 10?)
Primrose " 12 Brother - b Glasgow.
Joseph " 6 Brother - b Glasgow.
A few transcription errors on this Census. William error for James? SP has a birth for a James & a William Barclay, 1882, Montrose. (Not James William or William James!)
Couldn't find David or Isabella either on Census Returns or deaths. Will have another search later today.
Regards, Dod.
I see this will cross with MonicaL & Ev's posts, so you may already have some of the above information. Dod.