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)