For 10 points, name this Irish beer company and which once published a book of world records.
An executive at this company and descendant of its namesake liked auto-racing so much that he developed KLG spark plugs.  Gainsborough's Portrait of Countess Howe and a Rembrandt self-portrait were in the collection of an executive at this company transformed into the Kenwood House Museum.  The founder of this company agreed to pay 45 pounds a year for a nine-thousand-year lease on a building on James Street.  While working on quality control for this company, William Sealy (*) Gosset anonymously published a paper outlining the Student's t-test.  The McWhirter brothers compiled a list of facts for this company in 1954 that arose out of a dispute over Europe's fastest game bird.  By the outbreak of World War I, this company was greatly outselling its closest rival, Bass.  For 10 points, name this Irish beer company and which once published a book of world records.
An executive at this company and descendant of its namesake liked auto-racing so much that he developed KLG spark plugs.  
Guinness [prompt on Diageo plc]