William Sealy Gosset
At the brewery, William made new ways to test and improve beer quality using statistics. He learned these methods by studying, trying different things, and working with other experts. He wrote about his findings, but because of a rule at Guinness, he couldn't use his real name or mention beer. So, he wrote under the name "Student". This is why his famous "t-distribution" is called "Student's" instead of "Gosset's".