C
- C&A – Clemens and August Brenninkmeijer
- Cabela's – Dick Cabela
- Cadbury – John Cadbury
- Cadillac – Antoine Laumet de La Mothe, sieur de Cadillac, founder of Detroit, Michigan
- Cagiva – Giovanni Castiglioni (CAstiglioni GIovanni VArese)
- Callaway Cars – Reeves Callaway
- Callaway Golf Company – Ely R. Callaway, Jr.
- Calvin Klein – Calvin Klein
- Campagnolo – Tullio Campagnolo
- Campari – Davide Campari
- Campbell Soup Company – Joseph A. Campbell
- Canon – see Kwanon
- Carl Zeiss AG – Carl Zeiss
- Carlyle Group – Thomas Carlyle (indirectly, via the Carlyle Hotel)
- Casio – Tadao Kashio
- Celine – Celine Vipiana
- Cerruti 1881 – Nino Cerruti
- Chanel – Gabrielle "Coco" Chanel
- Charles Schwab Corporation – Charles R. Schwab
- Chase National Bank (to Chase Manhattan Bank and JPMorgan Chase & Co.) – in honor of Salmon P. Chase
- Chevrolet – Louis Chevrolet
- Chip Ganassi Racing – Chip Ganassi
- Christie's – James Christie
- Christian Dior – Christian Dior
- Chrysler – Walter Chrysler
- Citroën – André Citroën
- Cizeta – Claudio Zampolli
- CKE Restaurants – founded as Carl Karcher Enterprises
- Claud Butler – Claud Butler
- Clif Bar – Clifford Erickson (father of founder Gary Erickson)
- Cokin – Jean Coquin
- Colgate-Palmolive – William Colgate
- Collins Radio Company – Arthur A. Collins
- Colnago – Ernesto Colnago
- Coloni – Enzo Coloni
- Colt's Manufacturing Company, Colt Defense, Colt Canada – Samuel Colt
- Condé Nast Publications – Condé Montrose Nast
- Connolly Leather – John Connolly
- Cooper Car Company – Charles and John Cooper
- Coors Brewing Company, Adolph Coors Company – Adolph Coors
- Cord Automobile – Errett Lobban Cord
- Corel – Michael Cowpland (COwpland REsearch Laboratory)
- Cosworth – Mike COStin and Keith DuckWORTH
- Courage Compétition – Yves Courage
- Cox Models – Roy Cox
- Crane & Co. – Stephen Crane or the Crane family
- Cray Research – Seymour Cray
- Crumpler – Stuart Crumpler (co-founder)
- Cummins – Clessie Cummins
- Curtiss Aeroplane and Motor Company (to Curtiss-Wright) – Glenn Curtiss
- Cushman & Wakefield – J.Clydesdale Cushman and Bernard Wakefield
Read more about this topic: List Of Companies Named After People