In addition to those
1e Dragonlance Adventures has Knights of Solamnia that require going through two levels of cavalier variant Knights of the Crown to become Knights of the Sword, and then to qualify for Knights of the Rose you need to have gained at least two levels as a Knight of the Sword, in addition to other requirements.
Knights of the Sword Game Data
Minimum Requirements: No character starts out as a Knight of the Sword. Characters can only attempt to enter this class after first rising to 2d level as a Knight of the Crown and having sufficient experience points to gain 3d level there. At that point, the character must speak of his intent to become a Knight of the Sword to a Knight of that order who is no less than 7th level. The candidate must also have the listed minimums in all the following statistics in order to qualify for the Order of the Sword.
Sword Knight Minimum Scores
Strength 12
Intelligence 9
Wisdom 13
Dexterity 9
Constitution 10
Charisma None
The petitioning knight must then be brought before a Knightly Council at which a Sword Knight of no less than 7th level is one of the three presiding Knights. The Knight's name is then brought up before the Knighthood. If there is no question of honor brought up about the Knight during a Knightly Council in which his petition is heard, then the character is assigned a quest to show his worthiness and his dedication to the Order of the Sword.
The quest must include the following elements: a journey of no less than 500 miles and 30 days. three tests of the Knight's wisdom, one test of his generosity. one test of his compassion, the restoration of something that was lost, and single combat with an evil opponent of at least the same level as the candidate. The candidate must be victorious in this combat while demonstrating the ideals of honor and courage (note that this does not necessarily mean killing the foe). The knight can enlist the aid of anyone he wishes to complete the quest so long as he maintains the ideals of the Knighthood (i.e., does not further the cause of evil). The exact form of the quest is ultimately up to the OM, but it must include these elements.
Interestingly knights of the sword start getting cleric spells at level 6 and even have level 7 (max cleric spell level in 1e) at level 15. Knights of the Rose get no spells themselves and prestige out of Knights of the Sword before gaining spells.