Elimar I, Count of Oldenburg
Elimar I (1040-1112) was the first Count of Oldenburg and reigned from c.1091 to 1108.
Elimar married Rixa (also called Rikissa and Richenza), who according to the "Annals of Stade" was the daughter of Dedi or Adalger.
The name of Elimar is found in a charter dating from 1108.
His wife claimed that he was descended from Wittekind, a notable defender of the Saxons and the chief opponent of Charlemagne during the Saxon Wars of 777 to 785, but there is no other evidence for this.
Elimar is the patrilineal ancestor of the House of Oldenburg, which has ruled as monarchs of Denmark continuously since 1448, and also as counts, dukes, kings, or emperors of Norway, Sweden, Russia, Oldenburg, Schleswig-Holstein, Lauenburg, and Greece.
Present-day patrilineal descendants of Elimar include Margrethe II of Denmark, Harald V of Norway, Constantine II of Greece, Maria Vladimirovna, Grand Duchess of Russia, Charles, Prince of Wales, heir to the thrones of the Commonwealth realms, and Christopher, Duke of Schleswig-Holstein, Elimar's current senior male-line descendant.
Elimar was succeeded by his son Elimar II.
Christian II, Count of Oldenburg
Christian II, Count of Oldenburg( died 1233) was a German nobleman.
He was the ruling Count of Oldenburg from 1209 until his death.
Adolph, Count of Oldenburg-Delmenhorst
Adolph, Count of Oldenburg- Delmenhorst( b. before 1463 – 17 February 1500) was a Count of Oldenburg from 1482 until his death.
John VI, Count of Oldenburg
John VI, Count of Oldenburg( 1501 in Oldenburg – 1548 in Bremen) was a Count of Oldenburg.
He was the eldest son of John V, Count of Oldenburg and his wife, Anna of Anhalt- Bernburg.
He was supposed to rule jointly with his younger brothers.
However, his time in office was marked by conflicts between John VI and his co-rulers.
Christian I, Count of Oldenburg
Christian I, known as" the Quarrelsome"( died 1167) was Count of Oldenburg from 1143 to 1167.
He was son of Elimar II, Count of Oldenburg and his wife Eilika von Werl- Rietberg, daughter of Count Heinrich von Rietberg.
He is a direct male- line ancestor of Margaret II, Queen of Denmark and of King Harald V of Norway, and also of Prince Philip, Duke of Edinburgh, and thus of Charles, Prince of Wales, the heir apparent to the British crown.
Anthony I, Count of Oldenburg
Anthony I, Count of Oldenburg and Delmenhorst( 1505 – 22 January 1573, Oldenburg) was a member of the House of Oldenburg and was the Imperial Count of the Counties of Oldenburg and Delmenhorst within the Holy Roman Empire of German Nation.
His parents were John V, Count of Oldenburg( 1460- 1525) and Anna of Anhalt- Zerbst.
Otto I, Count of Oldenburg
Otto I, Count of Oldenburg( born ca. 1175; died 1251) was Count of Oldenburg from 1209.
His father was Maurice, Count of Oldenburg who died in 1209, whereupon Otto succeeded to the title along with his brother Christian II, Count of Oldenburg.
He participated in the Stedinger Crusade in 1234.
In so doing he won Moorriem, Holle, and Elsfleth from Stedingen and freed himself from the archiepiscopal sovereignty.
He also waged war on County of Hoya and on the Bishopric of Münster, the latter on a dispute over fief.
In 1244 he endowed Menslage- Börstel Monastery.
He was married to Mechthild von Woldenberg with whom he had a daughter, Salome, who married Gerbert, Count of Stotel.
With the death of his son Heinrich in 1255, this line became extinct.
Maurice, Count of Oldenburg
Maurice I( c. 1145 – c. 1211) was Count of Oldenburg from 1169 through 1211.
Count Maurice of Oldenburg was the son of Count Christian I of Oldenburg and his wife Kunigunde.
He married Salome, the daughter of Otto II, Count of Wickrath.
He is the male- line progenitor of Margrethe II of Denmark, Harald V of Norway, Constantine II of Greece, Charles, Prince of Wales, and Prince William, Duke of Cambridge.
John V, Count of Oldenburg
John V, Count of Oldenburg and Delmenhorst (also counted as John XIV, including also non-ruling namesake siblings; 1460, Oldenburg – 10 February 1526, Oldenburg) was a member of the House of Oldenburg.
He was the ruling Count of Oldenburg from 1500 to 1526.
His parents were Gerhard VI, Count of Oldenburg and Adelheid of Tecklenburg.
Elimar II, Count of Oldenburg
Elimar II (also Egilmar) was Count of Oldenburg from 1108 through 1142.
He was son of Elimar I, Count of Oldenburg and his wife Richenza.
Elimar married before 1102 Eilika of Werl-Rietberg, daughter of Henry, Count of Rietberg.

Question: When was Elimar Ii, Count Of Oldenburg's father born?