I've updated the family tree and re-posted it below, some with new pictures, some with better pictures, and some the way they've always been.
As always, a couple of caveats: Names have been shortened in some cases, and most of the names without Prince, Princess, King, or Queen in front of them have an "Hon." that I have left out for the sake of space. I've also left out first or second marriages that are not considered part of the royal line. Bold titles underneath the names are the hereditary names that get passed from generation to generation, and purple dates indicate when the monarch reigned.
Also, I've left out quite a bit of detail between HM King George Tupou I and II : HM King George Tupou I had three children. His eldest son was HRH Prince Tevita Unga, Former PM of Tonga. His youngest son was HRH Prince Vuna, which Vuna Rd. in Nuku'alofa is named after. HM King George Tupou I had only one daughter, named HRH Princess Salote Pilolevu (whom the current Princess is named after). HRH Princess Salote Pilolevu had 2 sons: Hon. Alipate Halakilangi and HRH Princess Salote Pilolevu (the first her 2nd son is named Hon Fatafehi) he is the father of HM King George Tupou II.