I believe it is 20 fame and 5 medals as I didn't have access to a 5th noble until my fame was boosted, somehow, to 20 points.
Logged
New Harte Family: Eros (Vix Tiramora, EC), Nyx (Fronen, BT), Chance (Avernus, DW), Scopuli (Gothica, Colonies)
Old Harte Family: Hyperion (Aurvandil, DW), William (IVF, BT), Katrina (Fronen, BT), Callandor II (Ohnar West, FE)