The House of Bjelbo (House of Folkung)

Upon the marriage of Folke 'the Fat', Jarl in Sweden to Ingegerd of Denmark, the Bjelbo make the connection to Charlemagne - The Father of Europe, all the reigning royal houses of Europe can trace their descent from him. 

"The House of Bjelbo (Swedish: Bjälboätten), also known as the House of Folkung (Folkungaätten), was an Ostrogothian Swedish family that provided several medieval Swedish bishops, jarls and kings. It also provided three kings of Norway, and one king of Denmark in the 14th century"
- from Wikipedia

Ingegerd's descent from Charlemagne is thru Gisla de France a daughter of Louis the Pious from his second marriage to Judith which in turn a daughter of Welf the progenitor of the Elder House of Welf.

Her descent is something like this.

1. Charlemagne, Emperor of the Holy Roman Empire 800-814 - Hildegardis
2. Louis I 'the Pious', Emperor of the Holy Roman Empire 814-840 - Judith
3. Gisla de France - Eberhard I, Margrave of Friaul
4. Berengar I, Holy Roman Emperor (915-924), Margrave of Friaul - Bertila of Spoleto
5. Gisela of Friaul - Adalbert 'the Rich', Margrave of Ivrea
6. Berengar II, King of Italy - Willa of Tuscany
7. Susanna 'Rozala' of Italy - Arnulf II, Graaf van Vlaanderen 973-987
8. Baudouin IV, Graaf van Vlaanderen 987-1035 - Otgiva de Luxembourg
9. Baudouin V, Graaf van Vlaanderen 1035-1067 - Adèle de France
10. Robert I 'the Friesian', Graaf van Vlaanderen 1072-1093 - Gertrud von Sachsen
11. Adele van Vlaanderen, Regent of Apulia 1111-1115 - Knud IV 'the Saint', King in Denmark 1080-1086
12. Ingegerd of Denmark - Folke 'the Fat', Jarl in Sweden

More here.

Bayeee!!!