Book Meme. Some answers and a couple of extra clues.

Most of these have been guessed now so I'm putting up the answers to those ones and adding a couple of clues for the last three though if anyone gets the first two I will be well impressed. Some have been guessed by more than one person so credit goes to either who got it first or who got the right book in the series. Half a point goes to aunty_marion  for getting the right series for 10 but I'm still interested to see if anyone gets the right book.

1 and 2 are crime series by the same writer but published originally under two different pen names.
10, Ignosi is also known as Umbopa

1. George, Kate, Sally

2. Janet, Martin, Richard

3. Gabriel de Witt, Conrad Tesdinic, Christopher = Chrestomanci books by Diana Wynne Jones (guessed by sbisson )

4. Pierre Arronax, Ned Land, Consiel = 20000 Leagues Under The Sea by Jules Verne (guessed by antonia_tiger )

5. Johann Sebastian Bach Smith, Eunice Branca, Jake Salomon = I Will Fear No Evil by Robert Heinlein (guessed by occams_pyramid )

6. Robinette Broadhead, Gelle-Klara Moynlin, Sigfrid von Shrink = The Heechee Saga by Fred Pohl (guessed by occams_pyramid )

7. Nathaniel York, Sam Parkhill, Walter Gripp = The Martian Chronicles by Ray Bradbury (guessed by sbisson )

8. Chris Godfrey, General Whittle, Morrey Kant = The Blue Aura by Hugh Walters (guessed by sbisson )

9. Jestocost, Sto Odin, Arabella Underwood = The Instrumentality Of Mankind by Cordwainer Smith (guessed by occams_pyramid )

10. José Silvestre, King Twala, Ignosi  (series guessed by aunty_marion but title still up for grabs)