Wilhelm Friedrich, Duke of Schleswig-Holstein
Friedrich, Duke of Schleswig- Holstein- Sonderburg- Glücksburg, from 1934 Duke of Schleswig- Holstein( 23 August 1891 – 10 February 1965), was the Duke of Schleswig- Holstein and Head of the House of Oldenburg from 21 January 1934 until his death on 10 February 1965.
Abel, Lord of Langeland
Abel Abelsøn( 1252 – 2 April 1279), Lord of Langeland, was the third son of King Abel of Denmark, Duke of Schleswig and younger brother of Valdemar III, Duke of Schleswig and Eric I, Duke of Schleswig.
As a member of the ducal family, he held several fiefs in Southern Denmark.
Friedrich Ferdinand, Duke of Schleswig-Holstein
Friedrich Ferdinand of Schleswig- Holstein- Sonderburg- Glücksburg( 12 October 1855 – 21 January 1934) was the fourth Duke of Schleswig- Holstein- Sonderburg- Glücksburg and became Duke of Schleswig- Holstein in 1931.
Valdemar the Young
Valdemar the Young( – 28 November 1231) was King of Denmark from 1218 until his death.
Valdemar was the eldest son and co-ruler of King Valdemar II of Denmark by his first wife, Dagmar of Bohemia.
He did not outlive his father so was never a sole monarch.
He is sometimes referred to as Valdemar III for example his tombstone reads in" Valdemar the Third, King of Denmark, son of Valdemar the Second".
Although Valdemar III is more commonly used to denote a later king, Valdemar of Schleswig.
Abel, King of Denmark
Abel Valdemarsen (1218 – 29 June 1252) was Duke of Schleswig from 1232 to 1252 and King of Denmark from 1250 until his death in 1252.
He was the son of Valdemar II by his second wife, Berengaria of Portugal, and brother to Eric IV and Christopher I.
As Duke of Schleswig, Abel came into conflict with his brother, King Eric IV, whose murder in 1250 he was suspected of orchestrating.
Upon taking an oath to clear himself of the allegations, he was elected king.
After a short reign, he was killed during a military expedition in Frisia.
Abel's reign was the shortest of any Danish monarch since the 9th century.
He founded a line of Dukes of Schleswig - the "Abel family" - which ruled the Duchy of Schleswig until 1375.
Valdemar III of Denmark
Valdemar III( 1314–1364) was king of Denmark from 1326 to 1329, while he was underage; he was also Duke of Schleswig as Valdemar V in 1325 – 26 and from 1330 to 1364.
He was a rival king set up against the unsuccessful Christopher II and was widely opposed by his subjects.
His term was ended when he abdicated.
Sometimes the earlier King Valdemar the Young( c. 1209 – 1231) is also referred as Valdemar III.
Valdemar III, Duke of Schleswig
Valdemar III Abelsøn (died 1257) was Duke of Schleswig from 1253 until his death in 1257.
He was the eldest son of King Abel of Denmark, Duke of Schleswig and Matilda of Holstein.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Eric II, Duke of Schleswig
Eric II Valdemarsøn( c. 1290 – 12 March 1325) was Duke of Schleswig from 1312 until his death in 1325.
He was the only son of Valdemar IV, Duke of Schleswig.
Eric Longlegs, Lord of Langeland
Erik Eriksøn, also known as Eric Longlegs,( 1272 – 1310), Lord of Langeland, was the second son of Eric I, Duke of Schleswig and younger brother of Valdemar IV, Duke of Schleswig.

Question: Who is Valdemar Iii, Duke Of Schleswig's paternal grandmother?
Answer: Berengaria of Portugal