Hi Coonwarra
This is the Census again, with the important POB and relationships added/defined:
1881: Parish 495, ED 8, Pg 1
Head: Robert NEILSON 59, Inn Keeper, b Polmont STG
Dau: Mary B 26, Inn Keepers Daughter, b Falkirk STG
Dau: Jean W. 24, Inn Keepers Daughter, b Falkirk STG
Dau: Lizzie I - 22, Inn Keepers Dau. b Falkirk STG
Son: Robert A, 18, Accountant, b Falkirk STG
Dau: Agnes M , 15, Pupil Teacher - b Falkirk STG
Son: John R 12, Scholar, b Falkirk STG
Dau: James R , 8 Scholar, b Cumbernauld
Son: Son: William T, b Cumbernauld
1891 Parish 495, ED 8, Pg 1
Head: Robert NEILSON 69, Spirit Merchant, b Polmont STG
Dau: Lizzie NEILSON 32, Housekeeper.,b Falkirk STG
Son: William NEILSON 16, Scholar, b Falkirk STG
Dau: Jane CHALMERS 35, Annuitant, b Falkirk STG
Grand-Dau: Mary E CHALMERS 2, b Rugby, Warwickshire
1901: Cumbernauld Dumbartonshire
Ref: Parish 495, ED 8, Pg 25
Address: Main Street - Spur Hotel
Head: Lizzie I NEILSON 43, Hotel Keeper, b Falkirk STG
Sister: Kate H HARRISON 42, b Falkirk STG
Neice: Madge C HARRISON 4, b England
Servant: Christina GRAHAM 54, Domestic Servant, b Greenock RNF
Not finding William 1901 - if you know he was married by then, do you know who to? Or what he did for a crust when he grew up?
Jane/Janet/Jessie/Jean/Jeannie/Jennet were all very interchangeable names!
Unfortunately this doesn't say what the Marital Status is - Jane is probably a widow - but you would have to look them up in SP originals for confirmation.
Cheers
AMBLY