The NSC family tree. Lineage is determined by who was hosting when the nation debuted. Only lines ending in current roster nations (as of NSC 243) are included. Credit to
@doctormalisimo for the idea and for creating a spreadsheet with lineage data.
Fun facts:
1. The longest lines (with 9 nations each) are
Arjastan -> Escotia -> Astoria -> Vorhota -> Scorpionia -> Pigeon Island -> Biflovatia -> Szimbaya Kingdom -> Grand Duchy of Strenci
Arjastan -> Escotia -> Astoria -> Vorhota -> Scorpionia -> Pigeon Island -> Bacchus -> Doire -> MatiMati
Arjastan -> Escotia -> Astoria -> Vorhota -> Scorpionia -> Pigeon Island -> Bacchus -> Doire -> Kimmystan
2. The largest of the 6 main branches (Adamsburg, Escotia, Hibernia, Reym-L-Dneurb, Spila, Ugaly) in terms of the current roster is Spila, with 24 current roster nations.
3. The longest lines that contain only 1 current roster nation are:
Arjastan -> Hibernia -> Alinta -> Prasia -> Luzinia -> Uferbruht -> Kadis -> Sodermalm
Arjastan -> Escotia -> Astoria -> Vorhota -> Scorpionia -> Pigeon Island -> Bacchus -> Emsfrynt
4. Due to joint hostings, Afnia, Marcobia and Roxma Nova are all in three of the main branches (Escotia, Spila, Ugaly).
5. Rehi Kaita does not have any family members due to debuting in the hostless edition
And here's a time-lapse video showing the evolution of the family tree over the editions (you may need to manually increase the playback quality to 1080p)