The following marques have been newly added to AllCarIndex:
- Heinz Fuchs (Germany)
- Hudlass [2] / Leonard Hudlass / LH (United Kingdom)
The following marques have been updated:
- Hieber (Germany)
- Hispano-Aleman (Spain)
- HL (France)
- Homark (United Kingdom)
- Houlberg (Denmark)
- Hugot (France)
- Hutton (United Kingdom)
- Huvo (Switzerland)