The Cadillac company was founded in 1902 by Henry Leland, who named it after Antoine de la Mothe Cadillac, the founder of Detroit. Cadillac is a division of General Motors that designs and builds luxury vehicles for the United States, Canada, and China markets. Cadillac's original logo is the family crest of Antoine de La Mothe, Seigneur de Cadillac.
The word Cadillac is inscribed beneath the "Wreath & Crest" in a calligraphic manner that closely resembles Vladimir Yefimov's English 157 typeface. The font is a commercial one and you can purchase and download it here.