Toby had several brothers, all LNER J70 steam trams like him, with whom he worked in his younger days at the harbour.
Toby is now old and his brothers have not been heard of since. As all the real J70 tram engines were scrapped, it can be assumed that Toby's brothers have been as well.
Toby's brothers are based on the GER C53 0-6-0T Wisbech steam tram (classed as J70 by the LNER).
Toby's brothers all had brown paint and black sideplates with "LNER" written on them in yellow.