I took a couple of people on this page to show something interesting.
In the same sense that anyone with European ancestry IS related to Charlemagne - we're most likely all related to Eleanor d'Aquitaine as well.
Here's a couple of Charlemagne lines - two people on this page:
Cynthia Abrams-Rothamel is Charlemagne's 34th great granddaughter!
Charlemagne
→ Louis I, The Pious
his son → Giséle of Cysoing
his daughter → Berengario I, re d'Italia
her son → Gisla del Friuli
his daughter → Berengar II, king of Italy
her son → Urraca d'Ivrea
his daughter → Regilinde of Lorraine
her daughter → Albert III, count of Namur
her son → Godefroi , comte de Namur
his son → Alix de Namur
his daughter → Agnes la Boiteuse de Hainaut
her daughter → Yolande de Coucy, Countess of Coucy
her daughter → Eleanor de Dreux
her daughter → Sir William Sinclair of Roslin, 6th Lord of Rosslyn
her son → Annabel Sinclair
his daughter → Sir Michael Wemyss of Wemyss, Knight
her son → Sir John Wemyss of Reres, Leuchars and Kincaldrum
his son → Elizabeth Wemyss of Reres
his daughter → Patrick Gray, Master of Gray
her son → Andrew Gray, 2nd Lord Gray
his son → Lady Margory Bishop
his daughter → Margery Casse
her daughter → Susan Cornell
her daughter → Richard Cornell
her son → Thomas Cornell
his son → Thomas Cornell, II
his son → John Cornell
his son → Edward Cornell
his son → Hannah Cornell
his daughter → Daniel Abrams
her son → Edward Abrams
his son → Nathaniel Abrams
his son → Daniel Abrams
his son → Frank M Abrams
his son → Mervin Brower Abrams
his son → Cynthia Abrams-Rothamel
his daughter
And:
Raúl Castro Chacón, Capitán de Navio is Charlemagne's 33rd great grandson!
Charlemagne
→ Louis I, The Pious
his son → Charles II "the Bald", Western Emperor
his son → Judith, countess of Flanders
his daughter → Baldwin II "the Bald", count of Flanders
her son → Arnulf I the Great, count of Flanders
his son → Baldwin III, count of Flanders
his son → Arnulf II the Young, count of Flanders
his son → Baldwin IV the Bearded, count of Flanders
his son → Baldwin V, count of Flanders
his son → Baldwin Vi, Count of Flanders and Hainault
his son → Baldwin II, count of Hainault
his son → Baldwin III, count of Hainaut
his son → Baldwin IV, count of Hainaut
his son → Baldwin V de Hainaut, Comte de Hainaut
his son → Isabelle de Hainaut, Reine de France
his daughter → Louis VIII le Lion, roi de France
her son → Louis IX the Saint, King of France
his son → Blanche Capet de France
his daughter → Alfonso el Desheredado, electo rey de Castilla y León
her son → Juan Alfonso de la Cerda de Castilla, señor de Gibraleón
his son → Alfonso Fernández de la Cerda, Señor de Almendra y Sardeal
his son → Leonor Rodríguez de la Cerda, Señora de La Vega de Armijo
his daughter → Melchor Messía de la Cerda
her son → Alonso Juan Messía de la Cerda Torres
his son → Alfonso Messía de la Cerda Poblete
his son → Juan de la Cerda Méndez de Contreras
his son → Mónica de la Cerda
his daughter → Francisco Larrain de la Cerda
her son → Mónica Josefa Larraín Lecaros
his daughter → Diego Echeverría Larraín
her son → José Ramón Echeverría Ruiz-Tagle
his son → Eloísa Echeverría Castro
his daughter → Homero Castro Echeverría
her son → Raúl Castro Puga
his son → Raúl Castro Chacón, Capitán de Navio
his son
Here's an article (one of many) that makes the argument that all of us Europeans are related to Charlemagne.
https://www.theguardian.com/science/commentisfree/2015/may/24/busin...
And if you really want to make your brain swell - look up "Pedigree Collapse" on Wikipedia.