For the first two questions do you want people to name the actual boy and girls in the song (for example Rita from Lovely Rita and Rocky Raccoon from Rocky Raccoon) or do you want people to name the person who inspired the song being wrote?I'm pretty sure you meant people like Rita so that's what I'm going to say.I'll also add names from cover songs.
1: Joan,Rose,Valerie,Pam,Prudence,Molly,Martha,Magil/Nancy,Julia,Sadie,Lizzy,Maggie Mae,Loretta,Mary,Sally,Madonna,Anna,Eleanor,Michelle,Lucy,Mrs.K (Mrs.Kite),Vera,Rita,Doris Day
2: Desmond,Maxwell,Bungalow Bill,John,Rocky Raccoon,Daniel,Chuck,Dave,Jojo,Jude,Robert,Lear,Mr.Kite,Sgt.Pepper,Pablo Fanque,BB King,Matt Busby,Mr.Barkley,Mr.Wilson,Mr.Heath
3: God by John (I don't believe in Beatles),All Those Years Ago by George (about John),When We Was Fab by George (about what it was like during the days of being a Beatle),How Do You Sleep by John (about Paul),Dear Friend by Paul (about John),Never Without You by Ringo (about George) - I know there's a bunch more by other people and bands but I can't think about any right now
4: Is this for words that were only in one Beatle song but not in any other Beatle song?If so then tomorrow I will fill this in.This was fun