Short answers, pulled from the story.
Paul McCartney wrote the majority of the lyrics for Eleanor Rigby, though John Lennon claimed to have written 70 percent in an early 1970s interview. McCartney disputed this claim by stating he contributed 80 percent while Lennon helped with a few words.
Eleanor Rigby appeared simultaneously on a double A-side single paired with Yellow Submarine on the 5th of August 1966 alongside Revolver album release. The track entered the Billboard Hot 100 in late August and peaked at number 11 for two weeks.
McCartney chose the first name Eleanor partly because of actress Eleanor Bron who appeared in their 1965 film Help! He selected the surname Rigby from a store called Rigby & Evens Ltd in Bristol where he visited his girlfriend Jane Asher during January 1966.
EMI Studios hosted the octet recording session on the 28th of April 1966 in Studio 2 where all eight string players performed together. George Martin composed a string arrangement for eight studio musicians comprising four violins two violas and two cellos.
At ninth Annual Grammy Awards in March 1967 Eleanor Rigby won Best Contemporary R&R Vocal Performance Male or Female for McCartney after three nominations. The song also entered National Academy of Recording Arts and Sciences' Grammy Hall of Fame in 2002.