The House of Schaumburg (von Holstein)

The von Holstein (the House of Schaumburg) family came into contact with Charlemagne through the marriage of Adolf II, Graf von Holstein to Mechtilde von Schwarzburg-Käfernburg herself a descendant of Charlemagne thru Louis the Pious. 

Adolf II was a son of Adolf I, who was the first Graf von Schauenburg from 1106 and the second Graf von Holstein from 1111 and the progenitor of House of Schaumburg.

Mechtild's descent :

1. Charlemagne, Emperor of the Holy Roman Empire 800-814 - Hildegardis
2. Louis I 'the Pious', Emperor of the Holy Roman Empire 814-840 - Irmingard|Ermengard
3. Lothar I, Holy Roman Emperor (823-855), King of Lotharingia - Irmgard de Tours
4. Irmingard|Irmgard - Giselbert, Count in Maasgau
5. Reginar I, Duke of Lorraine, Count in Hainault - Alberade
6. Reginar II, Count in Hainault - Aelis de Bourgogne
7. Reginar III, Count in Hainault - Adela de Louvain
8. Lambert I, Comte de Louvain 976-1015 - Gerberga of Lower-Lorraine
9. Lambert II, Comte de Louvain - Oda of Lower-Lorraine
10. Adela de Louvain - Otto, Graf von Weimar, Markgraf von Meissen
11. Kunigunde, Heiress of Beichlingen - Jaropolk Pjotr Isjaslawitsch, Prince of Wladimir & Turow
12. (Mechtild) von Wladimir, Heiress of Beichlingen - Günther I, Graf von Schwarzburg
13. Sizzo, Graf von Schwarzburg, Graf von Käfernburg - unknown woman
14. Mechtilde von Schwarzburg-Käfernburg - Adolf II, Graf von Holstein 1130-1164

CHARLEMAGNE is considered the "Father of Europe" (Pater Europae).

My ever reliable source is here.

Thanks to Leo.

Bayeee!!!