Like Boycott
re: Share Proper names that later become common words
It's called eponym. Some of the most obvious ones are:
Maverick - Samuel Maverick
Casanova - Giacomo Girolamo Casanova
Guillotine - Joseph-Ignace Guillotin
Cardigan - James Thomas Brudenell, 7th Earl of Cardigan
Wellington Boots - Arthur Wesley, Duke of Wellington
Mercurial - Roman God Mercury.
Platonic - Plato
That's it for now.
re: Share Proper names that later become common words
What about Dracula?
re: Share Proper names that later become common words
PCG
Re: Share Proper names that later become common words
Phanny Khan
Tees Mar Khan
Re: Share Proper names that later become common words
Zardari?
BTW who were these tees maar khan and Phanne Khan.. what about Falana?
Re: Share Proper names that later become common words
Nahi pata… I heard falana dhikna here at paklinks more than in real life… 
Zardari is new gali in modern Ordu?
Re: Share Proper names that later become common words
We can talk about names that became phrases as well. For example in Urdu we have - *Jo jeeta wohi Sikandar, *referring to Alexander the Great, I believe.
Re: Share Proper names that later become common words
What about Dracula?
Dracula isn't an eponym though and isn't used as a word. The name only refers to the character in Stoker's novel or the historical figure which the novel is based on. In Bram Stoker's 1897 horror novel, Dracula is the name of the vampire count who is title character and antagonist throughout the story. In the novel, the vampire Count Dracula attempts to move from his ancestral home in Transylvania to England, and is battled and ultimately thwarted by vampire expert Professor Abraham Van Helsing and a small band of men.
The character of Count Dracula was inspired by an actual historical figure, Vlad III Dracula. Vlad III was a Romanian general and Wallachian prince, also known as Vlad Tepes (meaning “the impaler”) on account of his fondness for that form of execution, who lived during the fifteenth century. His father was Vlad II Dracul, whose name Dracul translates to “dragon” in the Romanian language and was a reference to his membership in a military order of knights known as the Order of the Dragon. “Dracula” is the Romanian patronymic of Dracul and literally means "Son of the Dragon."
An interesting fact is that Dracula is not the name Stoker had originally intended for his title character. He originally intended for the vampire count to be called "Count Wampyr" and for the plot to be set in Styria, Austria rather than Transylvania. Stoker changed the name and setting when he came across the historical Vlad III Dracula while doing research for the novel. Also interesting and a bit ironic is the fact is that he never actually visited Transylvania and obtained most of his research from accounts in history and travel books of the time.
Re: Share Proper names that later become common words
Man behind Chauvinist
Re: Share Proper names that later become common words
Alexander Graham Bell