Over here you will find free vector brand logos in Illustrator, EPS, Corel Draw format..

Brand Vector Logos start with 'C' letter

Cz
Casal Catala de Quito Ecuador
Celtic Glasgow
Chapecoense Real
Casa Cívica A.C.
Chrysalis Records
Crybsa
Citroen
Copas Energy Education
Candeal
Comite Olimpico Ecuatoriano