Sonic Chronology:
Appendix

Line of the Guardians of the Floating Island (Generation # / Guardian #):

1/1. Edmund
2/2. Steppenwolf
3/3. Moonwatcher
4/4. Harlan
5/5. Rembrant
6/6. Aaron (died without child)
6/7. Jordan (brother of Aaron)
7/8. Mathias
8/9. Hawking
9/10. Tobor
10/11. Spectre
11/12. Sojuourner or Thunderhawk
12/13. Thunderhawk or Sojourner
13/14. Janella-Li
14/x. Athair (did not serve as Guardian)
15/15. Sabre
16/16. Locke
17/17. Knuckles
18/x. Lara-Su

Line of Dimitri (Generation # / Grandmaster #):

1/5. Dimitri
2/1. Menniker
3/2. Moritori Rex
4/3. Luger
5/4. Kragok (son of Luger)
5/7. Lien-Da (daughter of Luger)
5/x. Julie-Su (daughter of Luger)
6/x. Remmington (son of Kragok)?
6/x. Rutan (son of Lien-Da)
6/x. Lara-Su (daughter of Julie-Su)

Known Rulers of the Acorn Kingdom:

1. Alexander
2. Theodore, son of Alexander
* (Emerson, son of Theodore killed before he could assume the throne)
...Many Generations...
* Frederick
* Maxamillian, son of Frederick
* Elias, son of Maxamillian
* Sally, daughter of Maxamillian.