[large-G675.FTW]
Tentative evidence suggests that Don Rodrigo de Vivar "El Cid" Campeador [Champion] is a direct ancestor of Edward III---through his daughter, Cristina de Vivar> on to Blanche de Navarre (1177-1229)> to Isabella de France.
"El Cid"'s daughter Cristina married Ramiro Sanchez, lord of Monzon (d. 1116). They're mentioned in the Schwennicke revision of *Europaeische Stammtafeln*, Band II, Tafel 56. The well-known (hardly "tentative") descents from them to Edward III (d. 1377) go:
Ramiro and Christine -> Garcia VI -> Sancho VI -> Blanca -> Thibaut I
-> Enrique I -> Juana -> Isabel -> Edward III
Ramiro and Christine -> Garcia VI -> Blanca -> Alfonso VIII ->
Berenguela I -> Fernando III -> Leonor -> Edward II -> Edward III
Ramiro and Christine -> Garcia VI -> Blanca -> Alfonso VIII -> Blanca
-> Louis IX -> Philippe III -> Philippe IV -> Isabel -> Edward III
Ramiro and Christine -> Garcia VI -> Blanca -> Alfonso VIII -> Blanca
-> Robert -> Blanche -> Juana -> Isabel -> Edward III
Rodrigo Diaz (de Vivar), male line descendant (it would seem) of Judges
Lain Calvo and Nuno Rasura, tracing back to a 9th century Nuno
Belchidez. In this descent, he was linked (in the male line) with to
some of the early (non-hereditary) Counts of Castile, the Banu Gomez,
the Banu Morel, and the Flainez/de Cifuentes families, and (in the
female line) to the later (hereditary) Counts of Castile. He married
Jimena Diaz, a descendant of the 10th century count Piniolo Gundemariz.
Christina (Ruiz) de Vivar, married Ramiro Sanchez, Count of Monzon, who
was grandson (probably through an illegitimate link) of Garcia el de
Najera, King of Navarre.
Garcia IV, King of Navarre. He married Margaret l'Aigle, who descended
from a Norman lord killed at Hastings (and thus one of the few proven
Hastings descents).
Blanche of Navarre, married Sancho III, the Desired, King of Castile,
son of Alfonso VII, and great grandson of Alfonso VI, el Cid's
contemporary, and sometimes enemy on the thrown of Leon/Castile.
Alfonso VIII, King of Castile, victor at the battle of Las Navas de
Tolosa, which forever tipped the Iberian scales in favor of the
christians. He married Eleanor, daughter of Henry II of England, and
Eleanor of Aquitaine. In addition to son Enrique I (who d.s.p.) he had
several daughters, including the wife of Louis VIII, and
Berenguela of Castile, wife of Alfonso IX, King of Leon. This marriage
was disolved by order of the pope (Alfonso IX and Alfonso VIII were
first cousins), but their children were proclaimed legitimate. These
included Berenguela, wife of Jean, King of Jerusalem, and
(St.)Fernando III, King of Castile and Leon, who was father of Alfonso
X, the Learned, who competed for the Empire, and
Leonor of Castile, wife of Edward I, whose other wife, Margaret of
France was descended from Louis VIII.