The name 'Mercedes' was adopted from the name of a customer's daughter 'Mercedes Jellinek.'
Mercedes Adrienne Ramona Manuela Jellinek (September 16, 1889 – February 23, 1929) was the daughter of Austrian automobile entrepreneur Emil Jellinek and his wife Rachel Goggmann Cenrobert. She was born in Vienna. She is best known for her father having Daimler-Motoren-Gesellschaft's line of Mercedes cars named after her, beginning with the Mercedes 35 HP model of 1901. Also, at the 1902 Paris Automobile exhibition, her father hung a large picture of her. He even legally changed his name to Jellinek-Mercedes in 1903 after Daimler-Motoren-Gesellschaft registered Mercedes as a trademark in 1902. Her name is a Spanish Christian name meaning mercy.
Mercedes lived in Vienna and had two failed marriages. She had a magnificent wedding in 1909 in Nice, on the Cote d'Azur, with Baron von Schlosser. The couple lived in Vienna until World War I, which ruined them. They had two children; Elfriede (b. 1912) and Hans-Peter (b. 1916).
In 1918, Mercedes was begging for food in the streets. A little later, leaving her husband and two children, she married Baron Rudolf von Weigl, a talented but poor sculptor. She played music and had a good soprano voice, but never shared her father's passion for automobiles.