How did Google get its name?

How did Google get its name?

   
Google derived its name from the word “googol”, a term coined by then nine-year-old Milton Sirotta, nephew of the American mathematician Edward Kasner. The story goes, Kasner had asked his nephew to invent a name for a very large number – ten to the power of one hundred (the numeral one followed by 100 zeros), and Milton called it a googol. The term was later made popular and in Kasner’s book, Mathematics and the Imagination, which he co-authored with James Newman. Later, another mathematician invented the term “googolplex”, which represents ten to the power of a googol – a substantially larger number.
As the official representatives of www.google.com say, “Google’s use of the term [Google] reflects the company’s mission to organize the immense, seemingly infinite amount of information available on the web.”
Everybody knows it and uses it almost everyday. But how did Google got its name?