With Wendy's details, this looks to be the family in 1901:
John Crawford 31 butcher assistant b. Stirling, s'lingshire
Jeanie Crawford 27 b. Glasgow
Jeanie B Crawford 6 b. Hamilton
Maggie H Crawford 4 b. Hamilton
Janet B Crawford 2 b. Hamilton
John Marshall 21 boarder butcher assistance b. Stirling, s'lingshire
Address: 76 Portland Pl, Hamilton, Lanarkshire
Wendy, the separate household you mentioned in 1901:
John Crawford 56 coal miner hewer b. Craighha, Ayrshire
Matthew Crawford 25 son coal miner b. Lesmahagow, Lanark
Susan Crawford 20 daughter domestic b. Hamilton
Address: 74 Portland Pl, Hamilton, Lanarkshire
Monica