This looks like Jemima's family in 1901 from the extra information you've been able to give us. They seem to have travelled about a bit. It doesn't look as if Jemima's date of birth of the passenger list was correct.
1901 Piece: 710 Folio: 45 Page: 18
Broad Ditch, Southfleet, Kent
James Aldridge 45 Ordinary Ag Lab Newbery, Berkshire
Emma Aldridge 35 Field worker Ludlow, Shropshire
Mary A Aldridge 15 Field worker Ludlow, Shropshire
James Aldridge 14 Ordinary Ag Lab Tewkesbury, Gloucestershire
Emma Aldridge 10 Ross, Herefordshire
Jemima Aldridge 6 Bridgend, Wales
Tamar Aldridge 4 Strood, Kent
Obviously James Aldridge would be the Jim that went to Canada with them.