Here are the noble densities for each realm relative to number of regions.
Nobles Regions Density
Morek 34 34 1.0
Barca 40 20 2.0
Fissoa 27 18 1.5
Astrum 17 11 1.55
D'Hara 24 16 1.5
Corsanctum 15 12 1.25
Asylon 44 26 1.69
Luria Nova 35 27 1.30
Niselur 27 15 1.8
Swordfell 18 10 1.8