If you don't know the full names of characters like Nordich instead of knights,
I can tell you.
Its......
(take note,Maria,Marietta, Melissa, Zolgonark, Melad Margus Sacchito, Vienna, Vilgo and Mellia don't have full names)
Wilmgard: Willimgard(or Wilmgard) Ron Dragan d'Gleivnir
Nordich: Nordische(or Nordich) Raoul Dennis d'Gleivnir
Piche: Pisce(or Piche) Pianotte Lucius
Capehorn: Capehornus(or Capehorn) Mirza Lucius
Aquina: Aqueline(or Aquina) Ariel Lutia
Leonil: Leonel(or Leonil) Legid Fernando
Yelma: Yellma(or Yelma) Ul Varomone
Gunther: Ganzer(or Gunther) F. Albandor
Alier: Arlier(or Alier) Ciel Graceheize
Azhan: Agin(or Azhan) Donier Gaudy
I got them from : http://tvtropes.org/pmwiki/pmwiki.php/Characters/KnightsInTheNightmare
For the ages are:
Aquina is 25 years old
Leonil is 22 years old
Yelma is 36 years old
Alier is 18 years old
Nordich is 16 years old
Capehorn is 65 years old
Wilgard is 36 years old
Piche is 18 years old
Azhan is 77 years old
Gunther is 50 years old
Others i didn't call out dont have an age
For races:
Aquina is elvale
Leonil is elvale
Wilmgard is elvale
Nordich is elvale
Gunther is rondalia( spelled wrongly?)
Piche is unknown